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vaieri [72.5K]
4 years ago
9

PLEASE HELP ME WITH THIS!!! Due in 20 minutes

Chemistry
1 answer:
grin007 [14]4 years ago
5 0

4. Elements in the same group on the periodic table have the same number of valence electrons.

5. Properties of elements within a period on the periodic table change in a predictable way from one side of the table to the other.

6. The number of protons in an atom determines the identity of the element.

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7 0
3 years ago
Lead has a density of 11.3 g/cm3. what is the volume of a 15.1 g block of lead?
Crank
Hey there:

density = 11.3 g/cm³

mass = 15,1 g

Therefore: 

D = m / V

11.3 = 15.1 / V

V = 15.1 / 11.3

V = 1.336 cm³
8 0
3 years ago
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7 0
4 years ago
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