Atoms and the Periodic Table

Question 1

What is the atomic number?

Answer 1

The atomic number of an element tells you how many protons an element has

Question 2

What is the properties of a proton electron and neutron?

Answer 2

Proton - charge: +1 mass: 1 location: nucleus
Electron - charge: -1 mass: 0 location: energy levels outside necklines
Neutron - charge: 0 mass: 1 location: nucleus

Question 2

Why are atoms neutral?

Answer 2

Because the positive protons and negative electrons cancel each other out.

Question 3

What is the mass number?

Answer 3

The mass number of an element tells us the number of protons + neutrons in an atom.

Question 4

What are isotopes?

Answer 4

Isotopes are atoms with the same atomic number but different mass number.

Question 5

What are the 7 diatomic elements?

Answer 5

Nitrogen, oxygen, flourine, chlorine,bromine, iodine and hydrogen

Question 6

What are the periodic table facts?

Answer 6

Chemicals are arranged in atomic number order
Horizontal rows and called periods
Verticals columns are called groups

Question 7

Group 1 facts- alkali metals

Answer 7

Most reactive metals
Very reactive
1 outer electron
Most reactive at bottom
All solids

Question 8

Group 2 facts- alkaline earth metals

Answer 8

Less reactive than group 1
Most reactive at bottom
2 outer electrons
All solids
Still very reactive

Question 9

Group 7- halogens

Answer 9

Solids, liquids and gasses
Most reactive non-metals
Very reactive
7 outer electrons
Most reactive at top

Question 10

Group 8- noble gases

Answer 10

Unreactive
8 outer electrons
All gasses
Non-metals