A hydrogen atom which has lost an electron contains
one proton only
one neutron only
one proton and one neutron
one proton, one electronic and one neutron
Correct answer is A
No explanation has been provided for this answer.
The atomic number of chlorine is 17. What is the number of electrons in a chloride ion?
16
17
18
19
Correct answer is C
Cl = 17 = 2, 8, 7.
Cl ion = Cl\(^-\) = 2, 8, 8 = 18.
Y
Z
Y - Z
Z - Y
Correct answer is B
No explanation has been provided for this answer.
naturally radioactive
abundant in nature
a transition metal
an isotopic mixture
Correct answer is D
No explanation has been provided for this answer.
The oxide from electric power station is
carbon (IV) oxide
copper (ll) oxide
nitrogen (IV) oxide
sulphur (IV) oxide
Correct answer is C
Nitric oxide is an important component of the air pollution generated by automotive engines and thermal power-generating plants.
sulphur dioxide may also be produced in case of fuel containing sulphur, Nigeria crude is sulphur free,