Ions and Isotopes

To change Li to Li⁺, you need to:

• add one electron

• remove one proton

• remove one electron

• add one neutron

Answer explanation

Fe²⁺ and Fe³⁺ are different iron:

• ions

• isotopes

• neutrons

• molecules

¹⁴₆C and ¹²₆C are examples of carbon:

• ions

• isotopes

• neutrons

• molecules

¹⁴₆C has how many protons?

• 6

• 12

• 14

• 20

Li⁺ and Cu²⁺ are examples of:

• ions

• isotopes

• molecules

• elements

What is the symbol for an ion which has 8 protons and 10 electrons?

What is the nuclear symbol for the isotope of oxygen which has 9 neutrons?

• ¹⁶₈O

• ¹⁷₈O

• ¹⁸₈O

Li⁺ has how many electrons? (hint: the atomic number of lithium is 3)

• 0

• 1

• 2

• 3

How many protons, neutrons, and electrons does ⁷₄Be²⁺ have?

• 4, 3, 2

• 4, 3, 4

• 4, 3, 6

• 4, 6, 3

• 7 protons and 4 electrons

• 7 protons and 10 electrons

• 7 protons and 11 electrons

• 7 protons and 7 neutrons