Question

#1: Which element has the same number of valence electrons as hydrogen (H)?

A. helium (He)

B. oxygen (O)

C. nitrogen (N)

D. lithium (Li)


***my answer: D. lithium (Li)

is that right?

Answer 1

Li is in group 1, so that sounds right

Answer 2

#2: What happens to the atomic size of the elements as one goes from the bottom to the top of a group?

A. Atomic size stays the same as one moves from bottom to top in a group.

B. Atomic size decreases as one moves from bottom to top in a group.

C. Atomic size increases as one moves from bottom to top in a group.

D. Atomic size changes randomly as one moves from bottom to top in a group.

**my answer: C.

is that right??

Answer 3

and okay yay :) for #1!!

Answer 4

what about 2?

Answer 5

bottom = heavier elements

top = lighter elements

(think of it as like the heavy stuff floats to the bottom of the pool while the light/lighter stuff floats to the top)

so as you go from bottom ---> top, the size decreases

Answer 6

so my answer is right for #2?? it is C?

Answer 7

and #3: Which of the following places the elements in the correct order of increasing first ionization energy?

A. Be, Mg, Ca

B. Cl, S, P

C. P, S, Cl

D. F, O, N


***I don't get this one :( please explain! :)

Answer 8

no, bottom ---> top means big ----> small

Answer 9

so which answer was that?

Answer 10

it's not C because it's not increasing

Answer 11

so my answer to #2 is this?

B. Atomic size decreases as one moves from bottom to top in a group.

??

Answer 12

yeah

Answer 13

okay and what about #3? lemme repost it so its easier :P

Answer 14

#3: Which of the following places the elements in the correct order of increasing first ionization energy?

A. Be, Mg, Ca

B. Cl, S, P

C. P, S, Cl

D. F, O, N


***I don't get this one :( please explain! :)

Answer 15

do u get #3?

Answer 16

have a look at this site

http://www.shodor.org/chemviz/ionization/students/background.html

Answer 17

idk still... i use the equation?

Answer 18

no look at the chart

Answer 19

of ionization energies

Answer 20

oaky so bottom to top, left to right?

Answer 21

yeah it looks it

Answer 22

okay, so my answer is

C. P, S, Cl

??

Answer 23

it goes left to right in the periodic table.. :/ is that the answer?

Answer 24

looks perfect

Answer 25

yay! :) thanks!

Answer 26

yay! :) thanks!