Answer:
Symbol Be
atomic number 4
protons 4
neutrons 5
electrons 4
ion charge +2
Explanation:
Look at the periodic table and all the answers can be found there. If you would like to learn how to find them please message me below.
We will need to see what the picture looks like post the picture of the molecule
Answer:
E....H+
Explanation:
coz when hydrogen ions are formed they automatically join to form hydrogen
<u>Answer:</u> The percent change in volume will be 25 %
<u>Explanation:</u>
To calculate the final temperature of the system, we use the equation given by Charles' Law. This law states that volume of the gas is directly proportional to the temperature of the gas at constant pressure.
Mathematically,

where,
are the initial volume and temperature of the gas.
are the final volume and temperature of the gas.
We are given:

Putting values in above equation, we get:

Percent change of volume = 
Percent change of volume = 
Hence, the percent change in volume will be 25 %
Fluorine.
Because:- Atoms want to become stable, for an atom to become stable, they need 8 valence electrons. Since Fluorine has 7 valence electrons, it only needs one more electron to become stable and have an octet. An octet is when an atom/element has 8 valence electrons. Since Fluorine will need to gain an electron, it will have a negative charge, and become an anion.