Electronegativity generally increases moving from left to right across a period generally decreases moving from left to right across a period generally increases moving from right to left across a period generally decreases moving from right to left across a period

generally increases moving from left to right across a period

Explanation:

Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself. The size of an atom decreases as we move across the period because the electrons get added to the same shell and the nuclear charge keeps on increasing. Thus the electrons get more tightly held by the nucleus.

As, the size of an element decreases, the valence electrons come near to the nucleus. So, the attraction between the nucleus and the shared pair of electrons increases.

Hence, the correct statement is electronegativity generally increases moving from left to right across a period

you need to take a look at the periodic system in order to sort these elements into pairs that would most likely exhibit similar chemical properties. first, you need to find elements that are found in the same group (groups are vertical in the periodic system), and then to see whether they have the same valence number. if they meet these criteria, they will have similar properties.

the first pair: ne (neon) and kr (krypton), are noble gases found in group 8

the second pair: li (lithium) and k (potassium), found in group 1

the third pair: s (sulfur) and te (tellurium), found in group 6

they are made of gases.

they have a spherical shape.

they make energy through fusion.