<span>The number of neutrons bromine will have are equal to
= protons + neutrons
so,
80-35=45</span>
It’s B. The kinetic molecular theory states that matter is made up of constantly moving particles.
Answer:
Condensation and Depositon
Explanation:
Condensation is from gas to liquid
Deposition is from gas to solid
Answer:
D. 2:5
Explanation:
It has 5 valency electrons

Answer:
Density, 
Explanation:
The attached figure shows a 38.6 kg marble slab. The dimensions of the marble slab is 23 cm × 17 cm × 4 cm
Density = mass/volume
Volume of a cuboid shape is equal to, V = 23 cm × 17 cm × 4 cm
V = 1564 cm³
Density,

or

So, the density of the marble slab is
.