2.1.1: Atomic structure and isotopes

Question 1

What is the charge of a proton?

Answer 1

1+

Question 2

What is the charge of an electron?

Answer 2

1-

Question 3

Which particle has the same mass as proton?

Answer 3

neutron

Question 4

What does the atomic number tell about an element?

Answer 4

number of protons

Question 5

How to calculate the number of neutrons?

Answer 5

mass number-atomic number

Question 6

Define isotope

Answer 6

Atoms of the same element with different

number of neutrons and different mass numbers

Question 7

How to calculate mass number?

Answer 7

the number of protons + neutrons in an atom.

Question 8

Why does different isotopes of the same element react in the same way?

Answer 8

neutrons have no impact on the chemical reactivity, reactions involve electrons, isotopes have the same number of electrons in the same arrangement

Question 9

What are ions?

Answer 9

a charged particle that is formed when an

atom loses or gains electrons

Question 10

Define relative atomic mass

Answer 10

The weighted mean mass of an atom of an element compared with one twelfth of the mass of an atom of carbon -12

Question 11

Define relative isotopic mass

Answer 11

The mass of an atom of an isotope compared with one twelfth of the mass of an atom of carbon-12

Question 12

The relative isotopic mass is same as which number?

Answer 12

mass number

Question 13

What are the uses of mass spectrometry?

Answer 13

identify unknown compounds, find relative abundance of each isotope of an element, determine structural information

Question 14

How does a mass spectrometer work?

Answer 14

the sample is made into positive ions.
they pass through the apparatus and are
separated according to mass to charge ratio.
a computer analyses the data and produces
mass spectrum.