hansen class practice

What do these isotopes of carbon all have in common?

• neutrons & mass number
• atomic number and neutrons
• atomic number and electrons
• protons, atomic number, and mass number

How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

which atom has  4 neutrons?

• Li-6
• Li-7
• Li-8
• they have the same # of neutrons

How many protons are in Gold

• 79

• 197

• 118

• 276

How many Neutrons are in Neon

• 10

• 21

• 20

• 30

What is the atomic mass of Neon?

• 10

• 20.18

• 10.18

• 20

How many protons are in Beryllium?

• 4
• 9
• 5
• 2

How many electrons does an Iodine atom have?

• 53

• 126

• 73

• 179

What is the atomic weight of Iron?

• 26

• 55.845

• 56

• 30

The vertical (up and down) columns in the Periodic Table are called

• groups

• towers

• periods

• atomic numbers