Chap 4

Question 1

Each element has a set number of protons. But the atoms can lose or gain electrons.

Answer 1

Ion

Question 2

What is an anion? What is a cation?

Answer 2

Cations are ions that are positively charged. Anions are ions that are negatively charged

Question 3

What is the correct atomic notation for an atom with 78 neutrons and 52 protons?

Answer 3

(130 top TE 52 bottom)

Question 4

How many protons and neutrons are in the atom (44 SC 21)
?

Answer 4

21 protons, 23 neutrons

Question 5

There are three isotopes of Magnesium: Mg-24, Mg-25, and Mg- 26. Which isotope has the highest percent abundance? Hint: look at the periodic table.

Answer 5

Mg-24

Question 6

Periodic Table Symbol Memorize

Carbon -
Tin -
Calcium -
Boron -
Bromine

Answer 6

Carbon - C
Tin - Sn
Calcium - Ca
Boron - B
Bromine - Br

Question 7

Which element has properties most similar to sodium?

Answer 7

K

Question 8

How many protons and electrons are in an aluminum ion?

Answer 8

13 protons, 10 electrons

Question 9

What is the correct atomic notation for an atom with 15 protons and 16 neutrons?

Answer 9

31 Top 15 bottom P