In addition and subtraction, the significant figures in the answer must reflect the-

Black round and partialy brown with little hairs that stick out, or a little creature that digs in the dirt that has wird pink whiskers in the front of its nose thats partily blind

Hydrogen is the most abundant element on the periodic table..hope it .

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom