Module 2 Review: Atomic Structure & Periodic Table

Front

What particle in the atom has no charge and a mass of 1?

Back

Neutrons are neutral particles found in the nucleus of an atom, with a mass approximately equal to that of protons.

Front

How many neutrons does beryllium have?

Back

Beryllium has 5 neutrons. Its atomic number is 4, and its mass number is 9, so 9 - 4 = 5 neutrons.

Front

Which element has the electronic configuration of 1s2 2s2 2p6 3s2 3p2?

Back

Silicon (Si) has this electronic configuration, indicating it has 14 electrons.

Front

What is the electron configuration of an oxygen atom?

Back

The electron configuration of an oxygen atom is 1s2 2s2 2p4, indicating it has 8 electrons.

Front

How many electrons does helium have in a neutral atom?

Back

Helium has 2 electrons in a neutral atom, corresponding to its atomic number.

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 mass number of an atom?

Back

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

Front

Explain the significance of the periodic table.

Back

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

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom, important for chemical bonding.

Front

What is an ion?

Back

An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.