2nd Semester Interim Review Questions

What is the atomic number?

• the number of protons in the nucleus

• the number of protons and neutrons in the nucleus

• the number of neutrons in the nucleus

• the number of protons in the energy levels

The electron dot diagram or the Lewis Dot Structure for chlorine would have how many dots around the symbol?

• 7

• 17

• 18

• 35

What is the atomic number of this atom?

• 1

• 3

• 4

• 7

What is the mass number of this atom?

• 1

• 3

• 4

• 7

In order for an atom to be neutral, what has to be true?

• the atom has more protons than neutrons

• the atom has more neutrons than protons

• the atom has the same number of protons and neutrons

• the atom has the same number of protons and electrons

An atom has 10 protons, 15 neutrons, 10 electrons. What is it's mass number?

• 20

• 10

• 35

• 25

Use the isotopic notation of the element to determine the mass number.

• 29

• 63

• 63.546

• 34

How many valence electrons?

• 2

• 3

• 4

• 5

Adding or subtracting neutrons (charge = 0, mass = 1) makes the element change into an...

• ion
• mixture
• isotope
• neutral atom

What is the charge on a lithium atom that looses 1 electron?

• +1
• 0
• -1
• -2