Question

#1: An ion of magnesium has 12 protons and a charge of +2. How many electrons are in this ion?

A. 2

B. 10

C. 12

D. 14
**My answer: B. 10

Answer 1

yep!

Answer 2

aweomse!!

#2: A fluorine ion has 9 protons and a charge of 1. How many electrons are in an ion of fluorine?

A. 1

B. 8

C, 9

D. 10
**MY answer: B. 8

Answer 3

lol then it would loose two electrons

Answer 4

the charge has to have a sign. is it -1?

Answer 5

wait so is #2 correct??
and #3: An atom of calcium loses two electrons. What is the charge on an ion of calcium?

A. 0

B. +2

C. 2

D. +3
***My answer: B. +2

Answer 6

nope just 1

Answer 7

#3 is right.

for #2 F is in group 7.. those usually gain an electron and have a -1 charge, which is what i think they mean

Answer 8

if they just say charge of one without a sign, they have to say cation or anion to specify whether it gained or lost e

Answer 9

for #2 cuz isn't it if fluorine has a charge of +1, then there is one more proton than electron. Since there are 9 protons, there has to be 8 electrons??

Answer 10

you're technically right, but the question doesn't say +1

Answer 11

oh okay, so just go with 8 right??

Answer 12

i would go with 10, because F ions are usually -1

Answer 13

and #4: Which of the following has no electrons? Use a periodic table.

A. He

B. H

C. He^2+

D. H
***idk :( here is a periodic table attached just in case :)

Answer 14

think about it, an atom has to have electrons, an ION is the only that can have no electrons.. He, when neutral, has 2 protons and 2 electrons... so He^+2 lost 2 electrons, it's only to electrons...

Answer 15

so my answer to #4 is C??

Answer 16

yes

Answer 17

oh so what was the answer to #2??

Answer 18

and lemme post the last one :)

Answer 19

#5: Use a periodic table to determine how many protons and how many electrons are in K+.

A. 19 protons and 19 electrons

B. 19 protons and 20electrons

C. 19 protons and 20 electrons

D 19 protons and 18 electrons
***Idk :(

Answer 20

i would say D. 10, because F is -first of all the most electronegative element there is and- elements in group 7 gain an electron to complete it's "octet"

Answer 21

okay :) and #5?

Answer 22

look up K in the periodic table, look at the atom number, thats the amount of protons.
Then since it's +1 cation, it's lost an electron..

Answer 23

i meant atomic number* not atom number lol

Answer 24

okay so the answer to #5 is A??

Answer 25

no, remember the +1 charge ...

Answer 26

whats the difference between B and C??

Answer 27

there is none

Answer 28

but remember a + charge means it lost electrons.. because they are negatively charged.

Answer 29

oh so is the answer D?? cuz of what u said?

Answer 30

yes

Answer 31

awesome!! :) thank youuuu

Answer 32

no prob (: