Question

complete the following for each element:
element # of valence electrons # electron levels
helium
magnesium
carbon
selenium
give the amount of protons, electrons, and neutrons for each element:
element protons neutrons electrons
germanium
argon
calcium
zinc
gold

Explanation:

Step1: Recall element properties

Use periodic - table knowledge.

Step2: Determine valence electrons and levels

For Helium: 2 valence electrons, 1 electron level.
For Magnesium: 2 valence electrons, 3 electron levels.
For Carbon: 4 valence electrons, 2 electron levels.
For Selenium: 6 valence electrons, 4 electron levels.

Step3: Determine protons, neutrons and electrons

For Germanium: Protons = 32, Neutrons = 41, Electrons = 32.
For Argon: Protons = 18, Neutrons = 22, Electrons = 18.
For Calcium: Protons = 20, Neutrons = 20, Electrons = 20.
For Zinc: Protons = 30, Neutrons = 35, Electrons = 30.
For Gold: Protons = 79, Neutrons = 118, Electrons = 79.

Answer:

Element	# of valence electrons	# electron levels	Protons	Neutrons	Electrons
Magnesium	2	3	-	-	-
Carbon	4	2	-	-	-
Selenium	6	4	-	-	-
Germanium	-	-	32	41	32
Argon	-	-	18	22	18
Calcium	-	-	20	20	20
Zinc	-	-	30	35	30
Gold	-	-	79	118	79