why Sodium and phosphorus are in the same period, but they have different atomic radii?
Answers
Answer:
Because sodium is on the left side of the PT and phosporus is on the right side. And atomis radius decreases from left to right.
Explanation:
Related Questions
What would happen if a proton, an electron, and 2 neutrons were removed from Lithium (7)
Answers
Answer:
This would give us Helium 4.
Explanation:
Lithium7 has 3 protons, 4 neutrons and 3 electrons.
Removing 1 Proton 1 electron and 2 neutrons would form an element with
2 protons 2 electrons and 2 neutrons.
This is Helium 4.
Which of the following best describes spectator ions? A. that do not participate in the reaction B. lons made when compounds dissolve in water C. that are made of a single element D. Ions that combine to form a precipitate
Answers
Answer: A. that do not participate in the reaction
Answer:
a
Explanation:
a p e x :)
how does the immune system uses feedback mechanisms?
Answers
Answer:The main job of the innate immune system is to fight harmful substances and germs that enter the body, for instance through the skin or digestive system. The adaptive (specific) immune system makes antibodies and uses them to specifically fight certain germs that the body has previously come into contact with.
Which one of the following is not an agent of chemical weathering?
proprionic acid
carbon dioxide
acid rain
Answers
Answer:
its proprionic acid which do not cause any hazardous effect on environment it only effect internal body of human if it is ingested.
Explanation:
Where does the chemical energy of food start?
Answers
Answer:
Chemical energy in foodChemical energy in foodAs the bonds between the atoms in food loosen or break, a chemical reaction takes place, and new compounds are created. The energy produced from this reaction keeps us warm, helps us move, and allows us to grow. Different foods store different amounts of energyExplanation:
plz mark as brainilist
Answer:
BELOW !!
Explanation:
Chemical energy in food
As the bonds between the atoms in food loosen or break, a chemical reaction takes place, and new compounds are created. The energy produced from this reaction keeps us warm, helps us move, and allows us to grow. Different foods store different amounts of energy.
A force between an object and the surface it is moving over, is known as what?
power
O velocity
O force
O friction
Answers
In diamond, each carbon atom is covalently bonded to four other carbons in a
a. Polyhedron
b. Hexagon
c. Pentagon
d. Tetrahedron
Answers
Answer:
Tetrahedron
Explanation:
Each carbon atom in a diamond is covalently bonded to four other carbons in a tetrahedron. These tetrahedrons together form a three-dimensional network of six-membered carbon rings in the chair conformation, allowing for zero bond-angle strain.
A science teacher asked students to calculate the density of a toy block. The mass of the block was 110 grams and the volume of the block was 8 cubic centimeters. What was the density of the toy block in cubic centimeters?
Answers
Answer:
13.75
Explanation:
Density is equal to mass divided by volume. 110/8 = 13.75
Do sulphates react with acids
Answers
no it cannot I hope I helped
Answer:
Can not
Explanation:
Because both are salts of sodium and hydroxide
B. The mass of the sugar and water is greater than the mass of the sugal
C. The mass of the sugar solution is greater than the mass of the sugar and water.
D. We do not have enough information to determine anything about the mass of the sugar, water, or the
sugar solution.
8. When combined in the correct ratio, hydrogen and oxygen atoms can form water as show below.
+
Hydrogen
Oxygen
Water
this example, water is an example of which of the following?
Answers
Answer: it’s the first one ☝️
Mass NEVER changes
Which process is caused by natural selection
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Answer:
Four general conditions necessary for natural selection to occur are: More organisms are born than can survive. Organisms vary in their characteristics, even within a species. Variation is inherited.
Answer:
Natural selection can lead to speciation, where one species gives rise to a new and distinctly different species. It is one of the processes that drives evolution and helps to explain the diversity of life on Earth.
Explanation:
list three things that rely on the Sun as the major source of energy
Answers
Answer:
Three things that rely on the sun for energy is coal,oil, and natural gases
Explanation:
We use engery too cook our food that's an example of how gases are used.
We run our cars .Cars use oil.
And we use electricity for lights. You need coal for the electricity
Answer:
*Sun sends oxygen so all living kind (humans, plants, animals etc.) can live
*The sun sends heat to the earth so it wouldnt freeze
*We can use the sun as to create solar energy
Explanation: I hope this helps <3
Electron geometry of the central atom br in brf4+
Answers
Answer:
Octahedral
Explanation:
Recall that according to Valence Shell Electron Pair Repulsion Theory(VSEPR) the shape of a molecule is based on the number of electron pairs on the outermost shell of its central atom.
In BrF4^-, the bromine atom is surrounded by 6 electron pairs. Four bond pairs and two lone pairs. This means a total of six regions of electron density.
According to VSEPR Theory, BrF4^- has an octahedral electron geometry and its the molecular geometry will be square planar since it is of the type AX4E2.
An image of the BrF4^- is attached below.
No help just posting a picture
Answers
Stay safe homie
PLZ HELP ASAP THIS IS DUE LIKE RIGHT NOW
Answers
Answer:it's either the first or second one
Explanation:
the layers of the earth
SOMEONE ANSWER?!!?!?!,!,EMERGENCY Can someone tell me the answer plz plz I’ll give you brainlist and points plz This is my final test No wrong answers
Answers
Answer: Should be A)
Explanation:
the size of planets effects the amount of gravitational force each planet has, like jupiter, it has the most gravity.
what's the molar mass of Li3p
Answers
Answer:
51.79g Li₃P.
Explanation:
Li has a molar mass of 6.94 g (since there are 3, you multiply it 3 times) and P has a molar mass of 30.97 g. 6.94(3) + 30.97 = 51.79g.
When we drink water, it is absorbed into our blood through the digestive tract. If the concentration of water in body cells is low, cells must get water from the blood. What process allows water to enter body cells from the blood?
Answers
Answer:
Osmosis
Explanation:
Water is very essential for the body. When we drink water, our blood cells absorbs water from the body. This happen by a process called as osmosis process. Osmosis is type of diffusion process.
Water along with oxygen and carbon dioxide are some of the simple molecules that moves into the blood cell. Osmosis is the process by which water molecules passes into the cell bodies through its semi permeable membrane.
please help me ASAP PLEASE
Answers
If the producers of the ecosystem below make 14,000 units of energy. How much energy would be available to the very top trophic level?
Answers
Answer:
1.4
Explanation took test
Do I use molar mass when the problem gives me grams? (Yes or No), Right answer gets brainliest.
(Stoichiometry Review)
Answers
Answer:
yes
Explanation:
yes because the molar mass is an intensive property of the substance, that does not depend on the size of the sample. In the International System of Units (SI), the base unit of molar mass is kg/mol. However, for historical reasons, molar masses are almost always expressed in g/mol.
Answer:
Yes, if your calculating from grams to moles.
Can anyone explain the process of photosynthesis in detail? (Answer gotta be long. Sorry! Also I am in middle school. Means I don’t know which subject this is so I picked chemistry.)
Answers
What happens in this circuit if one of the light bulb burns out?
1. Both light bulbs will stop glowing
2. The other light bulb will stay on but get dimmer
3. the other light bulb will stay on and glow more brightly
4. the battery will lose its charge and stop working
Answers
Answer:
option 3
Explanation:
it is so because when both bulbs were there It took more electricity to charge both of them. now since only one is there it takes the power that is produced which made the other bulb glow and uses it for itself.
I'm sorry if u didn't understand
do all-stars mak energy through fusions
Answers
What is the energy of a radio wave whose frequency is 6.2 x 106 Hz?
Answers
Answer:
657.2 Hz
Explanation:
What do the three types of mixtures have in common?
(colloid, solution, suspension)
Answers
Answer:
A colloid is a heterogeneous mixture in which the dispersed particles are intermediate in size between those of a solution and a suspension. The particles are spread evenly throughout the dispersion medium, which can be a solid, liquid, or gas.
Explanation:
How many rings/energy levels would the Bohe model for an element
have if it had 12 electrons?
PLEASE HELP
Answers
PLEASE HELP !!
Use the diagram below to answer the following questions.
PLEASE HELP
E TE
Figure B
In Figure B, which region contains the noble gas family of elements?
ОА
OD
ОС
OB
Answers
Noble gas located in the region D
Further explanationNoble gas are located in group 18 in the periodic table consisting of helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), have a stable electron configuration where the valence electrons are 8(full outer shell of electrons), so it is very hard to react because of its stability
If we look at the periodic system of the elements, the noble gases are on the far right, so that in Figure 8 it is located in area D
And the other region :
A : alkali elements(group 1),
B : alkaline earth elements(group 2)
C : halogen elements(group 17)
1. Shankar and Sameer performed an experiment to differentiate primary, secondary and tertiary amines in a laboratory.Shankar correctly identified those 3 compounds but Sameer could only identify primary amine. a) What may be the reagent used by Sameer 1) Ammonical Silvernitrate solution 2) Chloroform & Caustic potash 3) Aqueous Copper Sulphate solution
Answers
Answer: 2) Chloroform & Caustic potash
Explanation:
The carbylamine reaction is a kind of chemical test which is done to detect primary amines in an unknown solution. It cannot detect secondary and tertiary amines.
The reaction involves the heating with up of the unknown solution with alcoholic potassium hydroxide or caustic potash and the chloroform.
In the presence of primary amine, the production of isocyanide results.
Which element has the least density at STP?
Answers
Answer:
Helium, this noble gas has the least density at STP
Explanation: