2.1 Atomic Structure & the Periodic Table

Question 1

Define an Element

Answer 1

Substance made up of atoms that all have the same no. of protons

Question 2

Define a Compound

Answer 2

A pure substance made up of two or more elements chemically combined

Question 3

Define a Mixture

Answer 3

A combination of two or more substances that are not chemically combined

Question 4

What is the relative mass of a proton?

Answer 4

1

Question 5

What is the charge of a proton?

Answer 5

1+

Question 6

What is the relative mass of a neutron?

Answer 6

1

Question 7

What is the charge of a neutron?

Answer 7

0

Question 8

What is the relative mass of an electron?

Answer 8

1/1840

Question 9

What is the charge of an electron?

Answer 9

1-

Question 10

What is a period?

Answer 10

The numbered ROW on the periodic table

Question 11

What is a group?

Answer 11

The numbered COLUMN on the periodic table

Question 12

What does an element’s period show?

Answer 12

No. of occupied shells

Question 13

What does an element’s group show?

Answer 13

Number of electrons in the outermost shell

Question 14

Define an isotope

Answer 14

Atoms of the same element, with a different neutron number

Question 15

Why do isotopes have the same chemical characteristics?

Answer 15

Same no. of electrons in the outermost shell

Question 16

Formula for relative atomic mass?

Answer 16

% of isotope A x mass of isotope A + % of isotope B x mass of isotope B / 100