Atomic Structure

Question 2

What is an atom?

Answer 2

Made up of one type of element

Question 3

What is a molecule?

Answer 3

One or more atoms joined together

Question 4

What is the mass of an electron?

Answer 4

1/1840

Question 5

What is the relative charge of an electron?

Answer 5

-1

Question 6

What is the relative charge of a neutron?

Answer 6

0

Question 7

What is the relative charge of a proton?

Answer 7

+1

Question 8

What is the mass of a neutron?

Answer 8

1

Question 9

What is the mass of a proton?

Answer 9

1

Question 10

What does the atomic number show?

Answer 10

Number of protons (and also number of electrons because Elemis on the periodic table have no charge)

Question 11

Where is the atomic number found?

Answer 11

It is the bottom number under the atomic symbol

Question 12

Where is the atomic mass found?

Answer 12

It is the top number above the atomic symbol

Question 13

What does the mass number show?

Answer 13

Number of protons + number of neutrons

Question 14

What are isotopes?

Answer 14

• atoms of the same element with the same atomic symbol
• they have the same number of protons and electrons but a different number of neutrons.

Question 15

What is the equation for the relative atomic mass of two or more isotopes?

Answer 15

Relative atomic mass=

((% of A x mass number) ➗ 100) + ((% of B x mass number) ➗ 100)

Question 16

How is the periodic table arranged?

Answer 16

• in periods and groups
• it goes across from smallest to largest atomic number

Question 17

What are chemical properties?

Answer 17

• The way which atoms react with one another
• All atoms want a full outer shell (like Noble Gases), they will ‘trade’ in such a way that both atoms have a full outer shell

Question 18

What does the period number tell us about an atom’s electronic arrangement?

Answer 18

The period number tell us the number of electron shells an atom has

Question 19

What does the group number tell us about an atom’s electronic arrangement?

Answer 19

The group number tells us the number of electrons in the outer shell of an atom