Atoms & Changes

What is an atom?

• Smallest particle of a substance that has all the properties of the substance.

• boiling point

• state

• volume

Melting, boiling, and freezing are examples of

• physical changes

• chemical changes

• magnetic changes

• electrical changes

Which of these describes a property of all matter?

• all matter gives off light

• all matter is attracted by magnets

• all matter is made of atoms

• all matter dissolves in water

Which shows the correct parts of the nucleus?

• Neutron and Electron

• Neutron and Proton

• Proton and Electron

• Proton, Neutron and Electron

Which part of an atom has a positive charge?

• Proton

• Neutron

• Electron

• None of them

Which part of an atom has a negative charge?

• Proton

• Neutron

• Electron

• None of them

Which part of an atom has no charge?

• Proton

• Neutron

• Electron

• None of them

Using the picture from a periodic table, what is the Atomic Number?

• 26

• Fe

• 55.845

• 56

Using the picture from a periodic table, what is the Atomic Mass?

• 26

• Fe

• 55.845

• 56

Using the picture from a periodic table, how many PROTONS are in Iron?

• 26

• 30

• 55.845

• 56