Which of the following elements matches the criteria below? 1. has 4 energy levels 2. tends to lose 3 electrons
a. k
b. ga
c. al
d. ge

The answer to your question is below.

Explanation:

1. Has 4 energy levels

a. K  Potassium is in period 4 so it has four energy levels

b. Ga  Also Galium is located in period four, so it has four energy levels.

c. Al  Aluminum only has 3 energy levels.

d. Ge Germanium has four energy levels

2. Tends to lose 3 electrons

a. K  Potassium only lose one electron

b. Ga Gallium loses 3 electrons because is in group three.

c. Al  Aluminum loses 3 electrons

d. Ge Germanium tends to gain or lose four electrons.

i just learnt this recently but i need to look through my notes again

the number of protons in the nucleus of a given element. has slight luster and conducts electricity at high temperatures like metal.but like a nonmetal,boron is brittle and does not conduct electricity well at low temperatures. in graphite, carbon is a soft,brittle solid.it is reflective,ductile,or malleable.