The first column of the periodic table is called the

Answers

Answer 1
alkali metals
if i’m correct pls mark me brainliest <3

Related Questions

Which waves have the highest frequencies?
A. microwaves
B.UV
C. waves with the lowest energy
D. waves with the highest energy

Answers

Answer:

D. Waves with the highest energy

Explanation:

The more energy the higher the frequency. More specifically there will be more energy per photon.

Microwaves are on the low end of the electromagnetic spectrum while UV is higher but there are more waves with more energy such as gamma rays.

what do you mean by work

Answers

Answer:

work is something u are working hard to get money or you are dedicated to it to have a daily wage

Correct answer is work is something you are working hard to get money or you are dedicated to it to have a daily wage

Which animal would you want to swim with the most, Dolphin or A White Whale?

Answers

Answer:

White whale

Explanation:

Just because I never seen a white whale:)

At every depth, soil composition remains the same.
O
True
O False

Answers

Answer:

false

Explanation:

Hope the answer was usefull for us

Answer:

false. there is the surface soil, which has a lot of partly decayed stuff, topsoil, which has minerals and organic material, subsoil, which is made from sand, silt, and clay that hasn't been broken down, and parent material, which is the place where not much living things live in, except for gigantic tree roots. then there is the bedrock, which is; you guessed it:rock entirely.

Explanation:

A young girl has blue eyes.
Which statement explains how the young girl inherited her blue eye color?
A. The girl received proteins from her mother and father that coded for blue eye color.
B. The girl received blue pigments from her mother and father that formed her blue eye color.
O c The girl received cells from her mother and father that blended together to form her blue eye color.
D. The girl received chromosomes from her mother and father containing DNA that coded for blue eye color.

Answers

Answer:

D

Explanation:

( I hope that this helps )

Answer:

The answer is d

Explanation:

Lime stone is a sedimentary rock that contains calcium this type of rock typically forms in warm shallow marine waters. Which process is involved in distributing calcium before it becomes part of the sedimentary rock?
A) tectonic movement
B) weathering
C) a biological process
D) volcanic activity

Answers

Answer:

the answer is B!!!

Explanation:

The density of a liquid substance is 0.95 g/mL. Three students calculated the density as 0.56 g/mL. Calculate the percent
error.

Answers

Answer:

The answer is 41.05 %

Explanation:

The percentage error of a certain measurement can be found by using the formula

[tex]P(\%) = \frac{error}{actual \: \: number} \times 100\% \\ [/tex]

From the question we have

actual number = 0.95 g/mL

error = 0.95 - 0.56 = 0.39

We have

[tex]p(\%) = \frac{0.39}{0.95} \times 100 \\ = 41.0526315...[/tex]

We have the final answer as

41.05 %

Hope this helps you

whats the lewis dot diagram for calcium

Answers

Draw the Lewis dot structure for each atom of the compound to show how many valence electrons are present in each atom. For example, the calcium atom in calcium chloride, CaCl2, has two valence electrons, and the chlorine atoms have seven valence electrons each.

express the answer to each of the following calculations in scientific notation with the correct number of significant figures: 45.0 x 270

Answers

Answer: 1.215 × 10^4  i think

Explanation:

Answer question number 7

Answers

it should more likely be on the lower side like ph2-4 since it requires acidic soil

Answer:

C

Explanation:

It should be acidic soil that is below pH7. pH2-pH4 is too low and it is a strong acid. Plants won't survive in very high acidity soil

Explain what is meant by the term "excited state" as it applies to an electron. Is an electron in an excited state higher or lower in energy than an electron in the ground state? Is an electron in an excited state more or less stable than an electron in the ground state?

Answers

Answer:

Excited state of an electron is the state attained by an electron after it has absorbed energy and it moves further from the nucleus.

an electron is at higher energy when excited and at lower energy when at ground state.

an excited electron is less stable due to the decrease in the nuclear force of attraction and the grounded electron is more stable due to it's close distance to the nucleus.

An electron in excited state has its electron present in higher energy level while an electron in ground state is present in lower energy level.

What is an energy level ?

Electrons present in an atom revolve in different orbits which are stationary states and are also called as energy levels. The energy levels are numbered as integers which are also called as principal quantum numbers.

Energy of the stationary state is given as E= -R

1/n² where R

is the Rydberg's constant. When an electron is excited, and it moves from lower to higher energy levels there is absorption of energy, while when it moves from higher energy level to lower energy level it radiates or gives out energy in the form of radiation.

They can also be defined as the distances between electron and nucleus of an atom . Electrons present in K energy level have least energy .Energy level diagrams are studied to understand nature of bonding , placement of electrons in orbits and and elemental behavior under certain conditions.

Learn more about energy level,here:

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what does CER mean for science?

Answers

Explanation:

Claim, Evidence, Reasoning (CER) model, an explanation consists of: A claim that answers the question. Evidence from students' data. Reasoning that involves a rule or scientific principle that describes why the evidence supports the claim.

What questions might remain that will one day be answered by new technology?

Answers

Answer:

Can we find a safe cure for cancer?

Explanation:

pls mark brainliest

What is Chlorofluorocarbons?

Answers

Answer:

Chlorofluorocarbons and hydrochlorofluorocarbons are fully or partly halogenated paraffin hydrocarbons that contain only carbon, hydrogen, chlorine, and fluorine, produced as volatile derivative of methane, ethane, and propane. They are also commonly known by the DuPont brand name Freon.

Explanation:

Answer:

Explanation: Chlorofluorocarbons and hydrochlorofluorocarbons are fully or partly halogenated paraffin hydrocarbons that contain only carbon, hydrogen, chlorine, and fluorine, produced as volatile derivative of methane, ethane, and propane. They are also commonly known by the DuPont brand name Freon

hope that helps.↑

8.90 kg is what in grams​

Answers

Answer:

It would be 8900 grams

Answer:

8900 Grams

Explanation:

1 kg = 1000 grams

8.90 x 1000=8900

Which of the following is a practice that shows you have intellectual honesty?
A. letting your beliefs influence your results
B. avoiding plagiarism of the works of others
C. making up data to support a special cause
D. copying the work of other scientists and claiming it as your own

Answers

Answer:

Avoid plagiarism and the work of others

Explanation:

I took the test and got it right. Hope this helps :)

Avoiding plagiarism of the work of others shows that you have intellectual honesty. So the correct option is B.

What is plagiarism?

The act of presenting someone else's ideas or work as your own, with or without that person's agreement, by integrating it into your work without giving it due credit, is known as plagiarism. This definition applies to all works, both published and unpublished, whether they are in manuscript, print, or electronic form.

Plagiarism can be willful, careless, or accidental. Plagiarism that is deliberate or careless is prohibited under exam regulations and is grounds for disciplinary action. In addition to text, additional media such as computer code, pictures, graphs, etc. must also include credit for the ideas and works of others.

It equally applies to both published and unpublished text and data taken from books and journals, lectures, theses, and other students' writings. Text, information, or other materials that you take from websites must also be credited.

Learning and using the rules of good academic practice from the start of your university career is the best way to prevent plagiarism.

Therefore the correct option is B.

Read more about plagiarism, here

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What happens to particles in a solid when heat is applied? (3 points)

a
They move around more.

b
They get closer together.

c
They reduce in size.

d
They stop moving.

Answers

A. They move around more.

Answer:

They move arond more

Explanation:

what type of energy is a orange being crushed

Answers

Chemical energy? I’m not completely sure

Answer:

Orange juice

Explanation:

Surface water is found in oceans, lakes, reservoirs, streams, rivers,and glaciers. Lakes, rivers, and reservoirs are where humans obtain most of the surface water they use. Aquifers are an underground source of water that humans also use.

Answers

Freshwater on the land surface is a vital part of the water cycle for everyday human life. On the landscape, freshwater is stored in rivers, lakes, reservoirs, and creeks and streams. Most of the water people use everyday comes from these sources of water on the land surface.

Which particle is NOT made up of quarks?
A: a proton
B: a neutron
C: an electron

Answers

Answer: C: an electron

Explanation:

Answer:

C: electrons

Explanation:

What is the mass in grams of o.0135
mol of the element sodium, Na?

Answers

Answer:

0.311g

Explanation:

n= m

M

where n is moles

m is mass of substance

M is molar mass

Mn = m

0.0135×23=m

0.311=m

Describe the transmission of sound through solids,liquids,and gases.​

Answers

I tihink it will help you

The density of ice is 0.92 g/cm3 and the density of rubbing alcohol is 0.80 g/cm3. If an ice cube is placed in a container of rubbing alcohol, the ice cube will
Question 7 options:

a) float in the rubbing alcohol with none of the ice cube submerged.

b) sink to the bottom of the container.

c) move up and down in the rubbing alcohol.

d) float in the alcohol so that most of the ice cube is below the surface of the liquid.

Answers

Answer:

Option B. Sink to the bottom of the container.

Explanation:

From the question given above, the following data were obtained:

Density of ice = 0.92 g/cm³

Density of rubbing alcohol = 0.80 g/cm³

From the density of both substance given, we can see clearly that the ice has a higher density when compared with the rubbing alcohol.

Thus, If an ice cube is placed in a container of rubbing alcohol, the ice cube will not float rather, it will sink to the bottom of the container because the ice has a higher density than the rubbing alcohol.

An organism that has two identical alleles (like two capital “T’s” or two lowercase “t’s” for example) is called

Answers

Answer:

h, o, m, o, z, y, g, o, u, s

Explanation:

h, o, m o z y g o u s- T, T or t, t

H, e, t e r o z y g o u s- T, t

I put the commas there so it would let me submit, because it said I put bad words for some reason...

ANSWER WITHOUT THE COMMAS LOL

density of a piece of wood that has a measurement of 24 cm3 and 768 g

Answers

Answer:

The answer is 32 g/cm³

Explanation:

The density of a substance can be found by using the formula

[tex]density = \frac{mass}{volume} \\[/tex]

From the question

mass = 768 g

volume = 24 cm³

We have

[tex]density = \frac{768}{24} \\ [/tex]

We have the final answer as

32 g/cm³

Hope this helps you

Answer:

The density of wood is 32 g/cm³.

Explanation:

Given data:

Mass of wood = 768 g

Volume of wood = 24 cm³

Density of wood = ?

Solution:

Density is equal to the mass divided by its volume.

Formula:

d = m/v

d = density

m = mass

v = volume

d = 768 g/ 24 cm³

d = 32 g/cm³

The density of wood is  32 g/cm³.

How to find the number of atoms?

Answers

To find the number of atoms, we multiple the number of mols by Avogadro's number, about 6.02x10^23

Mark Brainliest!

Answer:

to calculate the numbers of atoms in a sample, divide it's weight in grams by the amu atomic mass from the periodic table, then multiply the result by avogadro's number: 6.0 × 10^24

what is a well-tested, explanation that unifies a broad range of observations and hypotheses

Answers

Scientific theory is that

what is the standard form of 12,341 us?

Answers

Answer:

12341 in standard form = 1.2341 × 10⁴

Explanation:

When you split the number 12341 into a coefficient and a power of 10 you do get 12341 in exponential form, but there is an indefinite number of possibilities.

As you probably want 12341 in normalized scientific notation, the coefficient or significand of 12341 in scientific notation must be in the interval [1,10[.

As there are many ways to express 12341 in scientific notation, in this post we mean 12341 in normalized scientific notation, unless stated otherwise. Therefore:

12341 in scientific notation = 1.2341 × 10⁴.

This can also be expressed as 1.2341 × 10⁴, using the caret symbol, or as 1.2341e+4, which is called 12341 in e-notation.

Please help me immediately I will mark you as brainiest.

Answers

there's 18 atoms in ammonium phosphate

With an average acceleration of 0.50 m/s?, how long will it take a cyclist starting from
rest to reach 13.5 m/s?

Answers

Answer:

t = 27 s

Explanation:

Given data:

Average acceleration = -0.50 m/s²

Time taken to reach to the 13.5 m/s = ?

Solution:

Formula:

Vf = V₀ + at

Vf = 0

V₀ = 13.5 m/s

a = -0.50 m/s²

Now we will put the values in formula.

0 = 13.5 m/s - 0.50 m/s²t

0.50 m/s²t =  13.5 m/s

t =  13.5 m/s / 0.50 m/s²

t = 27 s

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