Question

part 4: answer the following multiple choice questions.

1. the elements on the periodic table of the elements are arranged in order of increasing

a) atomic mass c) mass number
b) atomic number d) oxidation state

1. how many electron shells does an element located in period 3 of the periodic table have?

a) 1 b) 2 c) 3 d) 4

1. which element has chemical properties most similar to sodium?

a) magnesium c) phosphorus
b) oxygen d) rubidium

1. which element is considered malleable?

a) gold b) sulfur c) hydrogen d) radon

Explanation:

1. The Periodic Table of the Elements is arranged in order of increasing atomic number. Atomic number is the number of protons in an atom's nucleus and determines the element's identity.
2. In the periodic table, the period number indicates the number of electron shells. So an element in period 3 has 3 electron shells.
3. Elements in the same group (vertical column) of the periodic table have similar chemical properties. Sodium (Na) is in Group 1 (alkali metals), and rubidium (Rb) is also in Group 1.
4. Malleability is a property of metals. Gold (Au) is a metal, while sulfur (S) is a non - metal, hydrogen (H) is a non - metal, and radon (Rn) is a noble gas.

Answer:

1. B. atomic number
2. C. 3
3. D. rubidium
4. A. gold