The elements on the periodic table are listed in increasing atomic number.
Hydrogen is the first element, and has an A.N. of 1. Also, its very interesting how it doesn't need 8 valence electrons to be stable.
The second element is Helium, which has an A.N (atomic number) of two.
Explanation:
Compound: a substance that is made up of more than 1 type of atom bonded together Example: H2O
Mixture: combination of two or more elements or compounds not chemicaly bonded together. example: Sugar and salt in one container
elements pure substance of an atom. Example: hydrogen
Answer:
quantum (93) the minimum quantity of energy that can be lost or gained by an atom (plural: quanta)
Explanation:
A quantum is the minimum amount of any physical entity involved in an interaction.
Answer:
when something is boiling. the temperature increases quickly so B and D are eliminated. So its either A or C. My guess is A
