B. mg
C. Helium and Neon
D. Magnesium and Chlorine
9. The tool used by scientists to determine easily the properties of elements.
B. Periodic Table of Elements
10. The chemical symbols of chlorine, potassium, copper, sodium, nitrogen
B. C, K, Co, Na, N, Fe
5. Which of these is the correct symbol for magnesium
A. MG
C. Mg
D. Mag
6. A pure substance which atoms are of the same type is called
A. Mixture B. Compound
C. Element D. All of the Above
7. Examples of noble gases are:
A. Hydrogen and Helium
B. Nobelium and Einsteinium
8. The lightest gas is:
A. Helium
B. Oxygen
4. Mendeleev's Table
and iron in order are:
A. C1, P, Co, So. Ni, I
C. Neon
D. Carbon Dioxide
C. Chemistry Elenient Table
D. Octet Table
C. CI, K, Co. So, N, Fe
D. CI. K. Cu, Na, N, Fe
APIA​