If a metal R forms a compound with the formula R(NO3)2 , the formula of its tetraoxosulphate (IV) is
R(SO4)2
RSO4
R2SO4
R2(SO4)3
Correct answer is B
No explanation has been provided for this answer.
3
4
5
6
Correct answer is A
No explanation has been provided for this answer.
The conclusion from Rutherford's alpha-scattering experiment is that
atoms are mostly empty space with a small nucleus
emissions from radioactive substances consist of three main components
there is nuclear pull on orbital electrons
electrons are deflected by both magnetic and electric fields
Correct answer is A
No explanation has been provided for this answer.
Iron
Sodium
Aluminium
Calcium
Correct answer is A
No explanation has been provided for this answer.
Y
Z
Y - Z
Z - Y
Correct answer is B
No explanation has been provided for this answer.