Structure of Matter Pre-Assessment

Which has a positive charge?

• neutron

• electron

• proton

Which number represents the atomic number?

• 2

• 4.0026

• 4

• He

Which has a neutral charge?

• proton

• electron

• neutron

Which number represents the average atomic mass?

• He

• 4.0026

• 2

• 4

Which has a negative charge?

• proton

• electron

• neutron

Every substance on the periodic table is made of one type of atom and the key difference between them is the number of protons. We call the individual substances on the periodic table

• compounds

• elements

The short or abbreviated way to write an element's name is called the element's:

• Address

• Nickname

• Symbol

• Code

Atoms are divided into two main parts that look like the model of the solar system. They are the

• nucleus and electron cloud

• periods and groups

• electron cloud and protons

Which part of the atom has the protons and neutrons

• The nucleus

• neutron cloud

• electron cloud

What part of the atom has the electrons?

• nucleus

• electron cloud