Semester 1 Exam (Absent)

Front

Which group of elements have 8 valence electrons?

Back

Noble Gases are the group of elements that have 8 valence electrons, making them stable and unreactive.

Front

How many valence electrons does selenium (Se) have?

Back

Selenium (Se) has 6 valence electrons.

Front

How many electrons should Beryllium have around its Lewis dot model?

Back

Beryllium should have 2 electrons around its Lewis dot model.

Front

What type of bond do ionic compounds form?

Back

Ionic compounds are formed by bonds between Metals and Nonmetals.

Front

What is the correct Lewis structure for the compound PBr3?

Back

The correct Lewis structure for PBr3 is structure D.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is the significance of the octet rule?

Back

The octet rule states that atoms tend to gain, lose, or share electrons to achieve a full outer shell of 8 electrons, leading to stability.

Front

Define ionic bond.

Back

An ionic bond is a type of chemical bond formed through the electrostatic attraction between oppositely charged ions, typically between metals and nonmetals.

Front

What is a Lewis dot structure?

Back

A Lewis dot structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist.

Front

How do you determine the number of valence electrons in an element?

Back

The number of valence electrons can be determined by the group number of the element in the periodic table.