Fe + 3NaBr → FeBr3 + 3Na
The Na is replaced by the Fe atom.
Answer is 56 protons and 56 electrons.
<em>Explanation;</em>
Atomic number is equal to number of protons. Hence, when the atomic number is 56, it means that atom has 56 protons.
When the element is in neutral state, number of protons = number of electrons. Hence, we can say that barium atom has 56 electrons.
But same element can have different number of neutrons. Those are called isotopes. Hence, we cannot say that there are 56 neutrons in barium atom without having its mass number. (Mass number = number of protons + number of neutrons)
Positively charged protons in the nucleus, hope this helps.
1 mol of Br = 79.9 g
15.7 g / 79.9 g = 0.196 moles of atoms
It means <span>a substance formed by chemical union of 2 or more elements or ingredients in definite proportion by weight.</span>
