Answer:
A
Explanation:
The letter A is the correct answer
Answer:
1s^2..2s^2..2p^6..3s^1
Explanation:
Since sodium has 11 electrons...its electron configuration is...;
1s^2..2s^2..2p^6..3s^1
;The powers of the energy levels(i.e s,p,d) should all add up to the number of electrons in an atom
*.When writing...please do not separate them.
A variable that is not being directly tested during an experiment should be independent
Answer:

Explanation:
Hello!
In this case, by considering helium gas as an ideal one, we can use the following equation:

Whereas P should go in atmospheres and T in Kelvins; thus we proceed as follows:

Best regards!
Answer:8
Everything after the decimal place is a significant figure here