1.) the attraction between two forms an ionic bond. a) atoms of the same change b) cations c) atoms of the opposite charge d) metals 2.) what is an ion with a positive charge called? a) anion b) cation c) valence electron d) covalent ion

1. Ionic form is formed when one or more electrons from the valence shell of an atom (electropositive metal ) are completely transferred to the valence shell of another atom (electronegative non-metal). Ionic bonding is the complete transfer of valence electron(s) between oppositely charged atoms.

For example NaCl (sodium chloride ) is an ionic bond, in which valence electron from Na gets completely transferred to the valence shell of Cl and ionic bond is formed between opposite ions that is Na (positive) and Cl (negative).

So option 'C' is correct choice.

2. A neutral atom can lose or gain an electron.

If the neutral atom loses an electron it will become ion with positive charge known as 'Cation'

If the neutral atom gains an electron it will become ion with negative charge known as 'Anion'

So an ion which positive charge is called 'Cation' , option B is correct.

when the volume of gas is   changed from   717.73 ml   to 852 ml   the temperature will   change   from 315   c to 452   c

    calculation

this is calculated using the charles law formula

that is,   v1/t1 = v2/t2

          v1=?

        t1 = 315 c   into   kelvin = 315 +273 = 588 k

        v2 = 852   ml

        t2 = 425c + 273 =698 k

make v1   the subject of the formula ( by   multiplying both side by t1)

  v1=( v2 xt1) / t2

v1= (852 ml   x 588 k)/ 698 k= 717.73 ml

answerca air mass;