Answer:
The answer is,
A. the total number of protons plus neutrons
Explanation:
Answer:
Skin, tears and mucus are part of the first line of defence in fighting infection. They help to protect us against invading pathogens.
Explanation:
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ELEMENTS:
1.) Hydrogen
2.) Helium
3.) Lithium
4.) Beryllium
COMPOUNDS:
1.) baking soda:sodium hydrogen carbonate sodium bicarbonate:NaHCO3
2.) bleach (liquid):sodium hypochlorite or hydrogen peroxide:NaClO H2O2
3.) bleach (solid):sodium perborate:NaBO3
4.) Borax:sodium tetraborate decahydrate:Na2B4O7.10 H2O