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cupoosta [38]
2 years ago
7

How many atom in protons

Chemistry
1 answer:
Alex Ar [27]2 years ago
7 0

Answer:

Its atomic number is 14 and its atomic mass is 28. The most common isotope of uranium has 92 protons and 146 neutrons. Its atomic number is 92 and its atomic mass is 238 (92 + 146).

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Nitrogen family - 5 valence electrons
Anna11 [10]

Answer:

  • <u>The elements that belong to the nitrogen family are nitrogen, phosphorus, arsenic, antimonium, bismuth, and moscovium.</u>

Explanation:

<em>Families</em> are group of elements that belong to the same column in the periodic table.

Some families have a well known name. For instance, alkali metals is the family of the elements that belong to the first column: Li, Na, K, Rb, Cs, and Fr (H is an exception, in spite it is in the first column it does not belong to the alkali metals family because it is a nonmetal). Other well known families are alkaline earth metals (column 2), halogens (column 3), and noble gases (column 18).

All the members of a family have the same number of valence electrons, i.e. electrons in the outermost shell.

  • <u>Nitrogen</u>, N, is in the column 15; it has 5 valence electrons, because its outer most shell has configurarion ns²np³ (n is 2 because nitrogen is in the second period).

The other members fo this family with the electron configuration of the outermost shell are:

  • <u>Phosphorus</u>, P, 3s² 3p³ (third period)

  • <u>Arsenic,</u> As, 4s² 4p³ (fourth period)

  • <u>Antimonium</u>, Sb, 5s² 5p³ (fith period)

  • <u>Bismuth</u>, Bi, 6s² 6p³ (sixth period)

  • <u>Moscovium</u>, Mc, 7s² 7p³ (seventh period)

6 0
3 years ago
What is the formula and formula mass of potassium sulphate?
Norma-Jean [14]
Pretty sure the formula is K2SO4.
7 0
3 years ago
Read 2 more answers
True or False.There is a chemical difference between the gaseous and liquid state of the same substance.
Diano4ka-milaya [45]
I think the The answer is true
8 0
3 years ago
What should we do<br> with the CO2?
Trava [24]

Answer:

The carbon dioxide (CO2) emitted from power plants each year doesn't have to go into the atmosphere. Researchers are optimistic that within the next decade we will be able to affordably capture CO2 waste and convert it into useful molecules for feedstock, biofuels, pharmaceuticals, or renewable fuels.

6 0
3 years ago
20 ml of a 1.0 m hcl solution are added to 3.0 l of acid solution with a ph of 5.35. the ph of the mixture rises to 5.33 was the
SashulF [63]

You may suppose you have a 0.1 M solution of NH3, from:

NH4Cl + NaOH > NH3 + H2O.

Then you can compute the pH from the concentration of NH3 and its pKb.

The concentration is high enough to use the simplified formula:

[OH] = sqr(Kb*conc)

3 0
3 years ago
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