Chemistry Quiz review

What is the formula for calculating effective nuclear charge

(a)  

The atomic number of Na (Sodium)

• 12

• 13

• 14

• 11

The atomic number of Magnesium

• 11

• 12

• 8

• 13

The atomic number of Aluminum

• 11

• 12

• 13

• 14

How many valence electrons are there in Aluminum

• 1

• 3

• 4

• 2

Sodium has 11 core electrons

• true

• false

Answer explanation

it has 10 core electrons and 1 valence electron. 11 electrons in all

(not graded/ no points) why do we call Alkali metals this name?

Why do we call Alkaline earth metals this name? And Noble gases, and Halogens.

Answer explanation

Sample answer: Alkali metals in the first group have 1s electron and are very reactive. Alkaline earth metals in group 2 have 2s electrons and are not as reactive. Halogens in group 17 have 2s and 5p electrons. Noble gases in group 18 have a full valence shell and are nonreactive.

In the s block we can find

• metals

• nonmetals

• transition metals

• inner transition metals

in the p block we can find

• metals

• nonmetals

• transition metals

• inner transition metals

in the d block we can find

• metals

• nonmetals

• transition metals

• inner transition metals