Answer:
The number of valence electrons in an atom is reflected by its position in the periodic table of the elements (see the periodic table in the Figure below). Across each row, or period, of the periodic table, the number of valence electrons in groups 1–2 and 13–18 increases by one from one element to the next
The first one, "Production of hydronium ions."
Answer: can be made up of one atom with several different elements in it (b)
Explanation:
i just got this question on Study Island
Answer:
Fishes play a vital role in the reef's food web, acting as both predators and prey. Their leftover food scraps and wastes provide food or nutrients for other reef inhabitants. Some species of sharks, skates, and rays live on or near the reef. ... These fish are herbivores and eat the algae within the coral.
Explanation:
