Chemistry Semester Exam

Front

What are valence electrons?

Back

Valence electrons are the electrons located in the outermost shell of an atom, which are involved in forming bonds with other atoms.

Front

How many valence electrons does Carbon have?

Back

Carbon has 4 valence electrons.

Front

What is the Lewis dot model?

Back

The Lewis dot model is a diagram that represents the valence electrons of an atom as dots around the element's symbol.

Front

What is the chemical formula for sulfur hexabromide?

Back

The chemical formula for sulfur hexabromide is SBr₆.

Front

What is an anion?

Back

An anion is a negatively charged ion that has gained one or more electrons.

Front

What is the atomic number of Carbon?

Back

The atomic number of Carbon is 6.

Front

What is the significance of the outermost orbit of an atom?

Back

The outermost orbit, or valence shell, determines how an atom interacts and bonds with other atoms.

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.

Front

What is the difference between ionic and covalent bonds?

Back

Ionic bonds involve the transfer of electrons from one atom to another, while covalent bonds involve the sharing of electrons between atoms.

Front

What is a chemical formula?

Back

A chemical formula is a way of expressing the composition of a compound using symbols for the elements and numbers to indicate the ratio of atoms.