Chemistry - Atomic structure and the periodic table. - The Atom

Question 1

What three sub-atomic particles do atom contain?

Answer 1

Protons
Neutrons
Electrons

Question 2

Where abouts in the atom are the protons, neutrons and electrons found?

Answer 2

Protons and neutrons - In the nucleus
Electrons - around the shells around the nucleus

Question 3

What is the relative charge for each protons, neutrons and electrons?

Answer 3

Proton = +1
Neutron = 0
Electron = -1

Question 4

How are ions formed?

Answer 4

-If an atom loses one or more electrons, it becomes a positively charged ion
-If an atom gains one or more electrons, it becomes a negatively charged ion

Question 5

What is the atomic number?

Answer 5

The number of protons in the nucleus of an atom.

Question 6

What is the mass number?

Answer 6

The number of protons and neutrons added together.

Question 7

What is an isotope?

Answer 7

Isotopes are atoms of an element with the normal number of protons (and electrons), but different numbers of neutrons. Isotopes have the same atomic number, but different mass numbers.

Question 8

What is the standard atom with a relative atomic mass of 12?

Answer 8

Carbon

Question 9

What is the relative atomic mass of an element?

Answer 9

The mass of the atoms of the isotopes.

Question 10

What is the formula for the relative atomic mass?

Answer 10

Ar = (mass 1 x abundance 1) + (mass2 x abundance 2) / 100

Question 11

What is the maximum number of electrons in each part of a shell?

Answer 11

First - 2
Second - 8
Third - 8
Fourth - 18