Question

sodium (na) is a _______ * 2 points
alkalai metal
nonmetal
noble gas
metalloid
what is the atomic number for calcium (ca)? * 2 points
40
6
20
0
xenon (xe) is a ________ * 2 points
alkaline earth metal
halogen
metalloid
noble gas

Explanation:

1. Sodium (Na) is in Group 1 of the periodic table, which are alkali metals.
2. The atomic number of calcium (Ca) is 20, which is a fundamental property from the periodic - table.
3. Xenon (Xe) is in Group 18 of the periodic table, which are noble gases.

Answer:

1. A. alkali metal
2. C. 20
3. D. Noble Gas