atoms
Density
elements/periodic table
non-metals
Metals
100

Most of the mass of an atom is in this.

What is an Atom?

100

Stars with a "V" and is used to find density.

What is volume.

100

When an atom gains or loses an electron.

What is an ion?

100

Group 18 is also known as this.

What are noble gases?

100

Elements group with one valence electron.

What is group 1?

200

Mostly empty space.

What is electron cloud?

200

Starts with an "M" and is used to find volume.

What is mass?

200
When an atom gains a neutron.

What is an isotope?

200

Meaning "breaks easily"

What is brittle?

200

The most reactive metals.

What is akali?

300

Number of protons in an atom.

What is atomic number?

300

The amount of space something takes up.

What is volume.

300

The number above the symbol on the periodic table.

What is atomic #?

300

Resist the flow of electricity and heat.

What is insulator?

300

Word meaning easy to shape with a mallet.

What is Malleable? 

400

Number of protons and neutrons in an atom.

What is atomic mass?

400

Measured in kilograms.

What is Mass?

400

Horizontal rows on the periodic table.

What is period?

400

Reactivity does this as you move from left to right in non-metals.

What is increase?

400

Word meaning "can't see through".

What is opaque?

500

The electron furthest from the nucleus.

What is valence?
500
Unlike mass changes with gravity.

What is weight?

500

118

Number of elements on periodic table?

500

Means easily transforms to gas.

What is volatile?

500
Metals in this group are the most reactive.

What is 1?