Magnesium has 12 protons.How many electrons are in its first energy level?
A) 2
B) 4
C) 6
D) 8
E) 10
Correct Answer:
Verified
Q3: The radioactive decay of 14C produces
A) carbon
Q19: Radioactive isotopes have _.
A) excess electrons
B) excess
Q25: Water is an example of a(n)
A)atom.
B)ion.
C)compound.
D)mixture.
E)element.
Q26: Nitrogen has an atomic number of 7.How
Q26: Which statement is NOT true?
A) Electrons closest
Q28: Which includes the other four?
A)atoms
B)molecules
C)electrons
D)elements
E)protons
Q31: An atom that gains or loses electrons
Q32: Which of the following is NOT accurate
Q32: Which is NOT a compound?
A)salt (NaCl)
B)a carbohydrate
Q34: By analogy, the orbitals and atomic nucleus
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