L1: The periodic table.

Question 1

What is an element?

Answer 1

This is a substance made of one type of atom.

Question 2

What is a compound?

Answer 2

This is a substance made of two or more different types of atoms chemically bonded together.

Question 3

What is a mixture?

Answer 3

This is a substance made of two or more different types of atoms which aren’t chemically bonded together (e.g. when an element and a compound are in the same substance, this is a mixture).

Question 4

What is a pure substance?

Answer 4

If a substance is a single element or compound and isn’t mixed with any other substance.

Question 5

What is a subatomic particle?

Answer 5

This is a particle of matter even smaller than an atom: electrons, neutrons and protons.

Question 6

What are the charges of the subatomic particles?

Answer 6

An electron has a charge of -1, a neutron has a relative charge of 0, and a proton has a charge of +1.

Question 7

What is the mass/AMU (atomic mass units) of an electron?

Answer 7

An electron has a relative mass of 0 AMU.

Question 8

What is the mass/AMU (atomic mass units) of a proton?

Answer 8

A proton has a relative mass of 1 AMU.

Question 9

What is the mass/AMU (atomic mass units) of a neutron?

Answer 9

A neutron has a relative mass of 1 AMU.

Question 10

How many different atoms are on the periodic table?

Answer 10

118.

Question 11

What is a group in the periodic table?

Answer 11

A column.

Question 12

What is a period in the periodic table?

Answer 12

A row.

Question 13

What do we find in group one of the periodic table?

Answer 13

The alkali metals.

Question 14

What do we find in group 7 of the periodic table?

Answer 14

The halogens.

Question 15

What do we find in group 0 of the periodic table?

Answer 15

The noble gases.

Question 16

What’s a metalloid?

Answer 16

these sometimes behave like metals, sometimes like non-metals.

Question 17

What’s the mass number in an atom?

Answer 17

The number of protons and neutrons

Question 18

what’s the atomic number?

Answer 18

number of protons (also tells you the number of electrons, keep in mind this is only in an atom).

Question 19

how many electrons can the first shell hold in an atom?

Answer 19

2

Question 20

how many electrons can the second and third shell hold in an atom?

Answer 20

8 each

Question 21

how do you write electronic configuration?

Answer 21

the amount of electrons in one shell, a comma, then the amount in the next shell (e.g.) 2,8,8.

Question 22

what tells you which group an element is in?

Answer 22

the amount of electrons in the outer shell

Question 23

if an atom is in the same group as another atom, would they tend to have similar properties?

Answer 23

yes

Question 24

what does the period tell you about an atom?

Answer 24

which shell the outer electrons are in.

Question 25

What is the charge of a proton?

Answer 25

+1

Question 26

What is the charge of an electron?

Answer 26

-1

Question 27

What is the charge of a neutron?

Answer 27

0