Which non-metal element is the most reactive? (1 mark)
Which of the following statements concerning halogens is fal…
Which of the following statements concerning halogens is false?
The formula of chloric acid is HClO3.
The formula of chloric acid is HClO3.
Water and oil-based paint are said to be miscible.
Water and oil-based paint are said to be miscible.
State what happens to the: a) first ionization energy…
State what happens to the: a) first ionization energy from left to right b) electronegativity from top to bottom c) reactivity from top to bottom in group 1 d) atomic radius from left to right
An atom of U-238 contains:
An atom of U-238 contains:
What is the general name of the groups of elements that cont…
What is the general name of the groups of elements that contain Mn, Au, Pt, Cu, Fe and Cr? (1 mark)
The most reactive metal of the following elements is:
The most reactive metal of the following elements is:
An isotope has:
An isotope has:
The rotting of food is a change that is:
The rotting of food is a change that is: