Ions and isotopes

Question 1

How do you tell whether an ion is positively or negatively charged?

Answer 1

Look to see if there is a charge in the subscript.

Question 2

What do transition metals form?

Answer 2

Cations with various charges.

Question 3

What is a cation?

Answer 3

• Forms when an atom loses one or more electrons and is given a positive charge.
• Metals form cations.

Question 4

What is an isotope?

Answer 4

Atoms of the same element but different mass numbers (different number of neutrons).

Question 5

What is an anion?

Answer 5

• Forms when an atom gains an electron giving it a negative charge.
• Non-metals form anions.

Question 6

What is an ion?

Answer 6

• Ions are atoms or groups of atoms with a positive or negative charge caused by gaining or losing an electron.
• Taking an electron away gives the ion a positive charge.
• Gaining an electron gives the ion a negative charge.

Question 7

What is the difference between O-16, O-17, O-18?

Answer 7

• Difference lies in the atomic mass.
• The number next to the symbol signifies the atomic mass.
• The atomic mass is altered due to the number of neutrons differing.

Question 8

When writing a word equation, do you have to draw an arrow between the reactants and the products?

Answer 8

Yes, an arrow must be used when writing a worded equation.