Hello can anyone help? Potassium, K, forms a compound with fluorine, F
Which statements about this compound are correct?

1) The compound is ionic.
2) The formula of the compound is KF.
3) The compound is soluble in water.

A) 1 2 and 3
B) 1 and 2 only.

C) 1 and 3 only
D) 2 and 3 only

A ) 1, 2 and 3

Explanation:

1 ) is correct because,

K donates 1 electron

F gain 1 electron from K.

If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.

2 ) is correct because,

K + F > KF

3 ) is correct because,

KF is soluble in cold water; very soluble in hot water.

A ) 1, 2 and 3

 1 ) is correct because,  

K donates 1 electron

F gain 1 electron from K.

If donating and gaining of electrons takes place between two electron, then type of compound formed is ionic.

2 ) is correct because,

K + F > KF

3 ) is correct because,

KF is soluble in cold water; very soluble in hot water.

zfoods? ok, pressure is used to keep the heat inside and to keep the food perfect.

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→