I think you should study!
It won’t be hard if you study.
You need to focus!
If you still study n
And failed it’s okay…
I understand that some people are good at school
And some aren’t… they have there own dream.
The first one is correct cause first of all it's atomic number is 7 and second of all it's atomic mass is about 15
Answer:
answer of your question is 4th
Explanation:
P205
4.The other light bulb will stay on and glow brightly.
Answer: The electron arrangement for gallium is:
Ar 3d10 4s2 4p1
