Answer:So far scientists have not found a way to determine the exact age of the Earth directly from Earth rocks because Earth's oldest rocks have been recycled and destroyed by the process of plate tectonics. If there are any of Earth's primordial rocks left in their original state, they have not yet been found.
Explanation:
Answer:
it shows that no atom have been gained or loosed in that reaction
First, we determine how many electrons can each subshell hold:
s can hold 2 electrons
p can hold 6 electrons
d can hold 10 electrons
f can hold 14 electrons
Second, we start distributing the 10 electrons on the orbitals of subshells based on the arrangement shown in the question :
1s will hold 2 electrons
2s will hold 2 electrons
2p will hold 6 electrons
All other orbitals will will hold zero electrons as the 10 were distributed among the first 2
Answer: 1s: 2
2s: 2
2p: 6
<span> 3s: 0
3p: 0
4s: 0
3d: 0
4p: 0
5s: 0</span>
Answer:
gases are compressible and liquids arent
Explanation:
molecules of liquids have a very little space between them...but gas molecules have a larger space between them...so we can easily compress them...when we compresse them enough...at right temperature...even whole atmosphere turn in to liquid....
A.
16 16 0
N -> O + e
7 8 -1
B.
40 40 0
K -> Ca + e
19 20 -1
