Unit 3 Test Review

Front

Where are electrons likely to be found as they travel around the nucleus?

Back

Electrons are likely to be found in the Electron Cloud.

Front

How many valence electrons should Lithium have in its Lewis dot model?

Back

Lithium should have 1 valence electron in its Lewis dot model.

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 in the molecule.

Front

If a neutral copper atom (atomic number 29) becomes an ion with a charge of 2+, how many electrons does the resulting ion have?

Back

The resulting ion has 27 electrons.

Front

What is true about isotopes?

Back

Isotopes have the same atomic number but different mass numbers.

Front

Define atomic number.

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, with equal numbers of protons and electrons, while an ion has a net charge due to the loss or gain of electrons.

Front

What is a proton?

Back

A proton is a positively charged particle found in the nucleus of an atom.

Front

What is a neutron?

Back

A neutron is a neutral particle found in the nucleus of an atom.

Front

What is the significance of valence electrons?

Back

Valence electrons are important because they determine how an atom can bond with other atoms.