3rd form Atomic Structure Test Name: ……………………………………….

1. Use the list of words/phrases below to complete the following passage. Words/phrases may be used once, more than once or not at all.Electrons, neutrons, mass number, atomic number, protons, ions, cations, anions, nucleus, one, five, three, two [9]

There are ………………sub-atomic particles in atoms:- ………………………………………………………………..……….

…………………….are positively charged, while……………………………..are negatively charged.

……………………… and …………………….. have the same mass but ……………………… are much lighter.

2. The following table shows hypothetical elements with some information missing. Use your knowledge of atomic structure to complete the table. [9]

Element Atomic #

# of protons

Mass #

# of neutrons

# of electrons

charge

Ab 5 5 3+Ce 16 10 2-Fg 13 12 0

3. Give the electronic configurations of the following atoms/ions [4]

a) Carbon 6C b) Potassium 19K

c) Magnesium 12Mg2+ d) Nitride 7N3-

4. Isotopes can be stable or unstable. What is the name given to unstable isotopes? [1] ………………………………………………….

5. Give THREE uses of unstable isotopes. [3]

………………………………………………..………………………………………………..………………………………………………..

TOTAL 26 MARKS

3rd form Atomic Structure Test Name: ……………………………………….

1. Use the list of words/phrases below to complete the following passage. Words/phrases may be used once, more than once or not at all.Electrons, neutrons, mass number, atomic number, protons, ions, cations, anions, nucleus, one, five, three, two [9]

There are ………………sub-atomic particles in atoms:- ………………………………………………………………..……….

…………………….are positively charged, while……………………………..are negatively charged.

……………………… and …………………….. have the same mass but ……………………… are much lighter.

2. The following table shows hypothetical elements with some information missing. Use your knowledge of atomic structure to complete the table. [9]

Element Atomic #

# of protons

Mass #

# of neutrons

# of electrons

charge

Ab 5 5 3+Ce 16 10 2-Fg 13 12 0

3. Give the electronic configurations of the following atoms/ions [4]

a) Carbon 6C b) Potassium 19K

c) Magnesium 12Mg2+ d) Nitride 7N3-

4. Isotopes can be stable or unstable. What is the name given to unstable isotopes? [1] ………………………………………………….

5. Give THREE uses of unstable isotopes. [3]

………………………………………………..………………………………………………..………………………………………………..

TOTAL 26 MARKS