Chemistry Post Test Review part 1

Front

What type of bond is present in CaCl2?

Back

Ionic bond.

Front

Which element has the largest atomic radius?

Back

Calcium has the largest atomic radius among the given options.

Front

What is the atomic number and mass number of an element with the configuration [He]2s² 2p¹?

Back

Atomic # = 5, Mass # = 11.

Front

Which element has the greatest electron affinity?

Back

Fluorine has the greatest electron affinity.

Front

How many neutrons are in an atom of phosphorus with an atomic number of 15 and a mass number of 31?

Back

16 neutrons.

Front

Define ionic bond.

Back

An ionic bond is a type of chemical bond that involves the electrostatic attraction between oppositely charged ions.

Front

What is the significance of atomic number?

Back

The atomic number represents the number of protons in the nucleus of an atom and determines the element's identity.

Front

Explain electron affinity.

Back

Electron affinity is the amount of energy released when an electron is added to a neutral atom to form a negative ion.

Front

What is the relationship between atomic radius and electron shielding?

Back

Atomic radius increases down a group due to increased electron shielding, which reduces the effective nuclear charge felt by outer electrons.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus.