Chemistry Sem 1 Exam Review

Front

What is the trend in atomic radius as you move down a group in the periodic table?

Back

The atomic radius increases as you move down a group due to the addition of electron shells.

Front

What is the electron configuration for the element Neon (Ne)?

Back

The electron configuration for Neon is 1s² 2s² 2p⁶.

Front

Which molecular geometry is associated with three bonding pairs and no lone pairs?

Back

Trigonal planar molecular geometry.

Front

Who discovered the electron?

Back

J.J. Thomson is associated with the discovery of the electron.

Front

What is the correct ionic formula for the compound formed between sodium and sulfur?

Back

The correct ionic formula is Na₂S.

Front

What is the definition of an ion?

Back

An ion is an atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What is the principle behind the VSEPR theory?

Back

The VSEPR theory states that the shape of a molecule is determined by the repulsion between electron pairs around a central atom.

Front

What is the difference between an ionic bond and a covalent bond?

Back

An ionic bond is formed through the transfer of electrons, while a covalent bond is formed through the sharing of electrons.

Front

What is the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of eight electrons.

Front

What is the significance of the periodic table?

Back

The periodic table organizes elements based on their atomic number, electron configuration, and recurring chemical properties.