Answer:
D. 9.
Explanation:
Mass number of an atom is the sum of the proton number and neutron number. For Be, the protons are 4 and neutrons are 5. So, we get 9 by adding them.
Answer:
j,i,h,g,e,d,c,b,a
Explanation:
im not sure lmk if im incorrect
Acids:
<span><span>Acetic acid (CH3COOH): vinegar, acetate
</span><span>Acetylsalicylic acid (HOOCC6H4OOCCH3): aspirin
</span><span>Ascorbic acid (H2C6H6O6): vitamin C
</span><span>Carbonic acid (H2CO3): soft drinks, seltzer water
</span><span>Citric acid (C6H8O7): citrus fruits, artificial flavorings
Bases:
</span></span><span><span>Aluminum hydroxide (Al[OH]3): antacids, deodorants
</span><span>Ammonium hydroxide (NH4OH): glass cleaner
</span><span>Calcium hydroxide (Ca[OH]2): caustic lime, mortar, plaster
</span><span>Magnesium hydroxide (Mg[OH]2): laxatives, antacids
</span><span>Sodium bicarbonate/sodium hydrogen carbonate (NaHCO3): baking soda</span></span>
Living things are made of elements, especially C, H, O, N, P, and S. Living things are alive because of the chemical reactions that occur in their cells, such as cellular respiration and protein synthesis, among many others.