Atoms & Elements

An atom with atomic number 6 would have how many protons?

• 6
• 12
• 3
• Cannot be determined 

What is the atomic number of an element with three protons?

• 2

• 1

• 3

• 6

How many protons does the element in this image contain?

• 14

• 7

• 15

• 18

What is the atomic mass for the element in this image?

• 14

• 7

• 15

• 18

How many elements are there in the periodic table?

• 118

• 100

• 226

• too many to count

Oxygen has an atomic number of 8. What can you conclude from this fact?

• An atom of oxygen weighs 8 grams

• An atom of oxygen has 4 protons & 4 electrons

• An atom of oxygen has 8 positrons

• An atom of oxygen has 8 protons

How many protons does this atom have?

• 2.5
• 6
• 5
• 10.811

Which number here is my atomic number?

• 5
• 10.811

How many Electrons

• 2.5
• 5
• 6
• 10.81

In order for me to find the number of neutrons, I must round the atomic mass and then do what?

• atomic number-atomic mass
• atomic number x atomic mass
• atomic mass + atomic number
• atomic mass - atomic number