The answer is D. I’m an pretty sure it is D
1. Calcium hydrogen phosphate
2. Iron(II) Hydrogen Sulfate
3. Calcium hydroxide
4. Aluminum chloride hydroxide
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.
A. electron. The nucleus has protons and neutrons, quark is the particle which forms protons and neutrons.
Answer:
I think the answer is
Our solar system will always be part of the Milky Way.