Why and how are elements arranged in 4 period

Answer:

Yes, it becomes 2 of H20 which is water

Answer:

Mitochondria

Explanation:

The enzymatic reactions of the cellular respiration begin in the cytoplasm, but most of the reactions occur in the mitochondria.

Answer:

Cellular respiration is the multi-step process that creates energy from nutrients and food molecules. It begins in the cytoplasm of the cell, with the mitochondria functioning as the main organelle where the rest of the process continues and finishes. During respiration, glycolysis occurs in the cytoplasm of the cell.

Explanation:

Answer:

manganese, Mn

Explanation:

From the question, we have;

The number of electrons in the 3d sub level = 5

The kind of element = d-block element

On the periodic table, the elements with electrons in the 3d-sublevel in increasing order are;

Sc, 3d¹ 4s²

Ti  3d² 4s²

V  3d³ 4s²

Cr 3d⁵ 4s¹

Mn 3d⁵ 4s²

Fe 3d⁶ 4s²

Co 3d⁷ 4s²

Ni 3d⁸ 4s²

Cu 3d¹⁰ 4s¹

Zn 3d¹⁰ 4s²

The elements with 5 electrons in their 3d-sublevel are chromium Cr and manganese, Mn however the electronic configuration of chromium is given as 3d⁵ 4s¹ rather than 3d⁴ 4s² due to the minor difference in the gap of energy between the 3d and the 4s orbital as such the element that has the main characteristic of 5 electrons in its 3d sub level is manganese, Mn.

The superscript 3 in 4pº tell that there are 3 electrons in this orbital

In an atom there are levels of energy in the shell and sub shell

This energy level is expressed in the form of electron configurations.  

There are 4 sub-shells in the shell of an atom, namely s, p, d, and f. The maximum number of electrons for each sub-shell is  

• s: 2 electrons  

• p: 6 electrons  

• d: 10 electrons and  

• f: 14 electrons  

Charging electrons in the sub-shell uses the following sequence:  

1s², 2s², 2p⁶, 3s², 3p⁶, 4s², 3d¹⁰, 4p⁶, 5s², 4d¹⁰, 5p⁶, 6s², etc.  

Arsenic is an element with the symbol As, which has an atomic number of 33 and a mass number of 75

Electron configuration of As : [Ar] 3d¹⁰4s²4p³

Each superscript shows the number of electrons that occupy each orbital

For the p orbital there are a maximum of 6 electrons, while the 4p³ orbital shows that there are 3 electrons in this orbital

Answer: different metal salt being heated I believe

Explanation:

The reaction gives off different color for example barium chloride gives a green color

Answer:

They’re created by the use of metal salts. These salts are different from table salt, and in chemistry ‘salt’ refers to any compound that contains metal and non-metal atoms. Some of these compounds produce intense colors when they are burned, which makes them ideal for fireworks.

Explanation:

Answer:

Reacting of 5 cm3 of baking soda with 100 cm3 of vinegar should produce 0.083 moles of CO2 gas, 0.083 moles of sodium acetate, and leave 0.01 moles of sodium bicarbonate unreacted.

Explanation:

Answer:

10g

Explanation:

The amount of copper in the heated mass of the new substance produced is still 10g because in any chemical action, mass is always conserved.

abiotic are non living things and biotic are living beings

and complete cells with well developed nucleus

these are the organism which make their own food by photosynthesis

these are the organism which depend on other organism for food

Monera

Protista

fungi

plantae

animalia

Answer:

A:Substance A is a strong acid and substance B is a weak base

Explanation:

From this information, we can conclude that substance A is a strong acid and substance B is a weak base.

A strong acid is one that ionizes completely in solution. Most strong acids are usually concentrated. 100% dissociation is a complete ionization.

A weak base ionizes slightly in an aqueous solution. 25% dissociation is weak ionization.

Answer:

a

Explanation:

Answer:

The correct answer is - the number of days the rainwater stands in the jars.

Explanation:

The independent variable or the manipulating variable is a variable in a research or study is the variable which affects the dependent variable or the variable that is going to measure in the study.

In the study, variables that recieves the treatment and changed in every subject are independent variables and in this study number of days the rainwater standing in various jars that might affect the growth of the bacteria in rainwater.

Answer:

River ecosystems are flowing waters that drain the landscape, and include the biotic (living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions of its many parts.

Explanation: it should be both

Answer:

Ecosystems mostly consist of both - abiotic and biotic factors. For that reason the answer which would properly address your question would be A - biotic and abiotic factors. Biotic factors are considered to represent the part of nature that are living and affect other organisms while abiotic factors are things which do not affect other living compounds.

Sodium Carbonate commonly known as Sodium Carbonate is a inorganic compound which used in detergents and to soften the water. Its chemical formula is [tex]Na_{2}CO_{3_[/tex]. It is carbonate base

Lemon juice contain citric acid whose chemical formula is [tex]C_{6} H_{8} O_{7}[/tex]. Citric acid is a weak organic acid thus It is used for disinfectants and cleaning as well.

When Lemon Juice and Washing Soda react, the reaction is just an acid-base reaction and forms trisodium citrate and carbonic acid. The latter is then dissociated into Carbon Dioxide and Water. Carbon Dioxide escapes in the form of bubbles and Sodium Citrate(salt) and Water behind.

(citric acid)+ (sodium carbonate)= (trisodium citrate)+(water)+(carbon dioxide)

            [tex]2C_{6}H_{8}O_{7} + 3Na_{2}CO_{3} ---> 2Na_{3}(C_{6} H_{3} O_{7})_{2} + 3H_{2}O + 3 CO_{2}[/tex]

Answer: Selenium is a chemical element with the symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between the elements above

Explanation:

Answer:

1. A 2. C

Explanation:

because it just is

Answer:

the right answer is:

Explanation:

How to Balance: NaHCO3 + HC2H3O2 = NaC2H3O2 + CO2 + H2O|

Answer:

NaHCO3 +C6H8O7

Explanation:

these are the formulas of sodium hydrogen carbonate and citric acid

k=4 c=2 o=3

I think that is right if it is not this is what I would do go on google and look it up yes it takes a while to get what you want but you are sure it is right I am sorry that I can not do more for you and if this is wrong i am sorry for that too.

Answer:

19. K=8 c=4 o= 12

20. k=2 c=1 o=3

21. n=12 o=30

22. Cl=16 o=8

23. ca=1 c=4 h=6 o=4

24. Na=12 Br=12

25. Na=3 H=3 c=3 o=9

26. Ga=10 Cr=30 o=105

27. fe=8 o=12

28. ba=6 Mn=12 o=48

Answer:

Fe + H2SO4  Fe2(SO4)3 + H2

Explanation:

its the answer on my answer key

Answer:

C- Fe + H2SO4  Fe2(SO4)3 + H2

Explanation:

The person above me is right. I also just took the test.

Answer:

covalent bond

Explanation:

covalent bond is a crystal structure in which the electrons do not leave their orbits.

Answer:true bond

Explanation:

True bond

Answer:

In order to identify a chemical property,we look for a chemical change.Chemical changes involve chemical reactions and are often observed through a change in colour or odor

Answer:  

1.A POWER DRILL COULD SET YOUR HOUSE ON FIRE, IN THEORY.

2.STICKY NOTES COME OFF EASILY BECAUSE THEIR ADHESIVE IS UNEVEN. ...

3.GUM IS CHEWY BECAUSE IT'S MADE OF RUBBER. ...

4.OFFICE BUILDINGS ARE EVER-SO-SLIGHTLY TALLER AT NIGHT. ...

5.A LEGO BRICK CAN SUPPORT 770 POUNDS OF FORCE. ...

6.POLISHING SHOES IS LIKE FILLING IN A ROAD'S POTHOLES.

Explanation:

Answer:

12 electrons

Explanation:

For the element magnesium, there are 12 electrons. It means that there are 12 electrons in a magnesium atom.

Hope this helped!

Answer: C

Explanation:

There are 761.4 grams of CS2 in 10.00 mol.

To calculate the amount of grams present in a given amount of moles, the molar mass of the substance must be used, as follows:

                                        [tex]m = MM \times mol[/tex]

In this way, just perform the following operation:

                                          [tex]m = 76.14 \times 10[/tex]

                                         [tex]m = 761.4 grams[/tex]

Thus, there are 761.4 grams of CS2 in 10 mol of the substance.

Learn more about mole calculation in: brainly.com/question/15693285

Answer:

centrifugation

Explanation:

Answer:

C. solid and liquid

I hope this helps!

Answer:

Figure  7.4.1 : Balancing Equations. You cannot change subscripts in a chemical formula to balance a chemical equation; you can change only the coefficients. Changing subscripts changes the ratios of atoms in the molecule and the resulting chemical properties. For example, water (H2O) and hydrogen peroxide (H2O2) are chemically distinct substances. H2O2 decomposes to H2O and O2 gas when it comes in contact with the metal platinum, whereas no such reaction occurs between water and platinum. The subscripts are part of the formulas and once the formulas for the reactants and products are determined, the subscripts may not be changed. The coefficients indicate the number of each substance involved in the reaction and may be changed in order to balance the equation. The equation above indicates that one mole of solid copper is reacting with two moles of aqueous silver nitrate to produce one mole of aqueous copper (II) nitrate and two atoms of solid silver.

Explanation:

Answer: 6

Explanation:

Element                Quantity

Copper                        1

Silver                           2

Nitrogen                      1

Oxygen                        6