Subatomic Particles

 $_{20}^{40}Ca$  How many protons does an atom of calcium have?

• 40

• 20

• 60

• Ca

 $_{34}^{79}Se$  What is the name of this element?

• Sulfur

• Selenium

• Strontium

• Silicon

 $_{13}^{27}Al$  How many neutrons does an atom of aluminum have?

• 13

• 24

• 14

• 40

 $_{28}^{59}Ni$  What is the mass number of the isotope of nickel given?

• 28

• 59

• Ni

• 31

 $_{72}^{178}Hf$  How many electrons does a neutral atom of hafnium have?

• 72

• 178

• 106

• 250

 $_7^{14}N^{3-}$  How many electrons does a 3- anion of nitrogen have?

• 3

• 7

• 4

• 10

 $_3^7Li^+$  How many protons does a 1+ cation of lithium have?

• 4

• 2

• 3

• 1

 $_8^{16}O^{2-}$  How many electrons does an oxygen anion have?

• 10

• 2

• 6

• 8

 $_4^9Be^{2+}$  The ion of beryllium is referred to as a(n):

• anion

• neutral atom

• cation

• isotope

 $_{53}^{127}I^-$  The ion of iodine given is referred to as a(n):

• cation
  

• anion

• isotope

• neutral atom