Answer:
the density of the cube is 304 g/ cm^3
Explanation:
Because 1520 ÷ 5 = 304 or 304 × 5 =1520
Answer:
B
Explanation:
They are atoms which have the same chemical properties because they have the
same number of electrons in their outer shell.
They are atoms which have the same number of electrons and protons but different
numbers of neutrons.
Group 2 elements of the periodic table have two outer shell or "valence" electrons. Hence, there will be two electrons shown in their respective electron dot diagrams.
