C pretty sure if not sorry
b. atomic radius
as it goes increases when it goes down the periodic table, it decreases when going left to right. all the others decrease while going down the table.
if it helps you to remember, everything here besides atomic radius has an e in it. and if you make a connection with it to electrons, they are negative, which means they would decrease going down the table. so e=decrease while going down
thats what helped me remember it, so i hope this technique could help you too.
We can define atomic mass the total of number of protons and number of neutrons in an atom or isotope.
<span>So when an isotope of yttrium has 39 protons and 59 neutrons, its atomic mass is equal to;
number of protons + number of neutrons = 39 + 59 = 98</span>
Answer:
B. the atomic weight of the element
Explanation:
since it talks about mass i think weight
