Which statement about the Periodic Table is correct?
Elements in the same group have the same number of electron shells.
It contains elements arranged in order of increasing proton number.
Metals are on the right and non-metals are on the left.
The most reactive elements are at the bottom of every group.
Elements J and K are in the same period in the Periodic Table.
J reacts with acids to produce a salt and hydrogen.
K reacts with sodium to form an ionic compound.
Which statement about J and K is correct?
An atom of J has more electrons than an atom of K .
J and K are both metals.
J and K are both non-metals.
J is to the left of K in the Periodic Table.
Metal X reacts with non-metal Y to form an ionic compound with the formula .
Which statements are correct?
1 X is in Group I of the Periodic Table.
2 X is in Group II of the Periodic Table.
3 Y is in Group VI of the Periodic Table.
4 Y is in Group VII of the Periodic Table.
1 and 3
1 and 4
2 and 3
2 and 4
Which statements about the position of the elements in the Periodic Table are correct?
1 Elements in the same group have similar chemical properties.
2 Elements in the same period have similar chemical properties.
3 Elements in the same group have the same number of electron shells.
4 Elements in the same group have the same number of outer shell electrons.
1 and 3
1 and 4
2 and 3
2 and 4
The number of protons and the number of neutrons in the atoms of elements X, Y and Z are shown.
Which statement about the elements is correct?
X and Y are isotopes of the same element.
Z forms an ion with a +2 charge.
X and Z react together to form an ionic compound.
X, Y and Z are non-metals.
Strontium displaces magnesium from molten magnesium chloride.
Bromine displaces iodine from aqueous potassium iodide.
Which row describes the change in reactivity down both Group II and Group VII of the Periodic Table?
Group II
Group VII
decreases
decreases
decreases
increases
increases
decreases
increases
increases