How does an atom of chlorine-37 become a chloride ion with a -1 charge?
17
35.45
o
a. the atom gains 1 electron, to make a total of 21.
o
b. the atom gains 1 electron, to make a total of 18.
o
c. the atom loses 1 proton, to make a total of 36.
o
d. the atom loses 1 proton, to make a total of 16.

B. The atom gains 1 electron, to make a total of 18 electrons.

Explanation:

Chlorine is the 17th element in the periodic table, so it has atomic number 17:

Z = 17

This means that a neutral atom of chlorine has 17 protons and 17 electrons.

When a chlorine atom gains 1 electron, its electric charge (initially zero) becomes -1, since the electron has negative charge of -1 (in elemntary charge units). This also means that the number of electrons in the ion is now

17 + 1 = 18

So the correct answer is

B. The atom gains 1 electron, to make a total of 18 electrons

we're given that v₀ = 0 and a = 5.4 m/s². therefore, since v = at + v₀ for constant acceleration the equation for velocity is

after 28s,

m/s

which i would round to 150 m/s as my final answer