Answer:
1 and 2
Explanation:
when we r adding chlorine to water
the water is clean
The atomic number of Be is 4, and so it has 2 shells. There are valence electrons in the second, which is the outermost, shell of Be. To get the element with one more shell, there would be 3 shells on the new element, and 1 less valence electron, so the new element should have 1 valence electron. Sodium is the element with 3 shells, and one valence electron which fits perfectly into the description.
Pretty sure it’s Mixture if I’m not wrong
Amino Acids- To build proteins.
Hydrochloric Acids- Help humans digest foods.
