2.1 atomic structure

Question 1

define isotope

Answer 1

atoms of the same element with different number of neutrons but the same number of protons and different masses

Question 2

define cation

Answer 2

positive charged ion (fewer electrons than protons)

Question 3

define anion

Answer 3

negative charged ion (more electrons than protons)

Question 4

define mass number and its others names and notations

Answer 4

(A) nucleon number: sum of protons and neutrons

Question 5

define atomic number and its other notations

Answer 5

(z) proton number: number of protons in the nucleus of an atom

Question 6

relative isotopic mass

Answer 6

the mass of an isotope compared with 1/12th mass of an atom of carbon-12

Question 7

define

relative atomic mass

Answer 7

Ar The weighted mean mass of an atom of an element relative to 1/12th the mass of an atom of carbon-12

Question 8

Relative formula mass

Answer 8

The weighted mean mass of the formula unit of a compound compared with 1/12th mass of an atom of carbon 12

Question 9

Relative molecular mass

and its other notation

Answer 9

(Mr) The weighted mean mass of a molecule of a compound compared with 1/12th of the mass of carbon-12

Question 10

Proton: abbreviation,relative charge,relative mass

Answer 10

Abbreviation: p+
relative charge: 1+
relative mass: 1

Question 11

Neutron: abbreviation,relative charge,relative mass

Answer 11

Abbreviation: n
relative charge: 0
relative mass: 1

Question 12

electron abbreviation,relative charge,relative mass

Answer 12

Abbreviation: e-
relative charge: 1-
relative mass: 1/1836

Question 13

How do you work out the number of neutrons?

Answer 13

A-Z