Answer:
I think it is c
Explanation:
When water turns into water vapor it goes into the air so it must be lighter
The answer is atom because it cannot be broken down into small substances
Explanation:
an acid will give away a proton and become a conjugate base.
A base will accept a proton and become a conjugate acid.
Answer:
if you add a neutron to lithium-7 it becomes a compound nucleus of lithium-8
The correct option is B.
Mendeleev was the one who originated the idea of arranging elements in the periodic table according to their chemical and physical properties. He left spaces in the periodic table and predicted the discovery of those elements that had not been discovered then. One of these elements is Gallium. He predicted that gallium is going to be a metal and he gave the properties that the element will possess. He also predicted that the element gallium will be placed under aluminium in the periodic table.
