An Atom will not normally form a chemical bond if it has_______valence electrons.
A.8
B.10
C.4
D.6
Which of the following does NOT describe how atoms can fill their outermost energy level?
A. By sharing electrons with other atoms.
B. By losing electrons to other atoms.
C. By gaining electrons from other atoms.
D. By gaining kinetic energy from other atoms.
The half-life of a radioactive atom is 2 months. If you start with a 1g of the element, how much will remain after 6 months?
A. One-half of a gram will remain
B. One-eight of a gram will remain
C. One-fourth of a gram will remain
D. None will remain
2007-05-28 07:52:49 · 5 answers · asked by Anonymous in Science & Mathematics ➔ Chemistry
1. A
2. D, when it is talking about energy levels it is referring to electron orbitals and kinetic energy has nothing to do with that
3. B, 6 months is 3 half-lifes so1/2^3 = 1/8
2007-05-28 08:03:19 · answer #1 · answered by night_fox51 4 · 0⤊ 0⤋
The only one I am sure of is the last one, which is B.
1gram
2 months
1/2 gram
2 months
1/4 gram
2 months
1/8 gram.
2007-05-28 15:02:21 · answer #2 · answered by Patrick M 1 · 0⤊ 0⤋
Brittany has the first two right. The last is (B). Three half-lives means (1/2)^3 or 1/8th remains.
2007-05-28 14:59:57 · answer #3 · answered by cattbarf 7 · 0⤊ 0⤋
answer #1-A
answer #2-D- I think
answer #3-C
2007-05-28 14:58:17 · answer #4 · answered by Zero_Lyfe 5 · 0⤊ 0⤋
I think a, d, idk for sure.
2007-05-28 14:56:49 · answer #5 · answered by LadyOreo 4 · 0⤊ 0⤋