2.1.1 Atomic structure and Isotopes

Question 1

What is an isotope?

Answer 1

An isotope is atoms of the same element with the same number of protons but different numbers of neutrons and, therefore different masses.

Question 2

Isotopes have …

Answer 2

Different physical properties but similar chemical properties

Question 3

Why do isotopes have different physical properties

Answer 3

Isotopes have different masses resulting in different physical properties

Question 4

Why do isotopes have similar chemical properties?

Answer 4

Isotopes have the same electronic structures (Chemical reactions always depend on electrons!)

Question 5

What is the definition of relative atomic mass?

Answer 5

The weighted mean mass of an atom compared to 1/12 of the mass of a
carbon-12 atom

Question 6

What is the definition of relative isotopic mass?

Answer 6

The mass of an isotope compared to 1/12 of the mass of a carbon-12 atom

Question 7

What is the definition of relative molecular mass?

Answer 7

The average mass of a molecule compared to 1/12 of the mass of a carbon-12 atom

Question 8

3 sub-atomic particles?

Answer 8

Protons
Electrons
Neutrons

Question 9

Charge of an electron?

Answer 9

-1

Question 10

Mass of an electron?

Answer 10

1/1836

Question 11

Charge of a proton?

Answer 11

+1

Question 12

Mass of a proton?

Answer 12

1

Question 13

Charge of a neutron?

Answer 13

0

Question 14

Mass of a neutron?

Answer 14

1

Question 15

Where are electrons found in an atom?

Answer 15

Orbitals

Question 16

Where are Protons and neutrons found in an atom?

Answer 16

Nucleus

Question 17

What is mass spectrometry?

Answer 17

An apparatus that determines the mass of a molecule or isotope by comparing the mass: charge ratio by causing substances to have positive ions.

It allows you to find an unknown compound or a relative abundance

Question 18

RAM formula?

Answer 18

                               100