AS periodicity

Which of the following elements has the smallest atomic radius?

• Sulfur

• Chlorine

• Aluminum

• Sodium

Tags

NGSS.HS-PS1-1

Which Block is letter C

• s - block

• p - block

• d - block

• f - block

Tags

NGSS.HS-PS1-1

When Z_eff increases, the nucleus attraction

towards electrons become

• Weaker

• Stronger

• Remain the same

Across a period from left to right , atomic radius

• decreases

• increases

• increases, then decreases

• decreases, then increases

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Cations are _________________ in size than anions.

• bigger

• smaller

• same

Tags

NGSS.HS-PS1-1

What is meant by isoelectronic species?

• Groups of atoms and ions which have the same valence electrons.

• Groups of atoms and ions which have the same electronic configuration.

• Groups of atoms and ions which have the same n.

What is the tendency of an atom to attract electrons towards itself?

• atomic radius

• ionization energy

• shielding

• Electronegativity

Which is larger... P or P^3- ?

• P^3- because it gains an energy level
• P^3- due to extra electron repulsion
• P because it loses an energy level
• P because of extra electron repulsion

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Which is smaller... Mg or Mg²⁺ ?

• Mg because it gains an energy level
• Mg due to extra electron repulsion
• Mg²⁺ because of extra electron repulsion
• Mg²⁺ because it loses an energy level

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What happens to atomic radius across a period?

• the atoms get bigger because the nucleus is bigger as more protons are added

• the atoms get bigger because there are more ve-

• the atoms get smaller because with more attraction to the extra protons, the e- cloud moves closer to the nucleus

Tags

NGSS.HS-PS1-1