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.
B
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.
D
Metal X reacts with non-metal Y to form an ionic compound with the formula X2Y.
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
A