First Semester Extra Credit

Front

Subatomic particles with a negative charge

Back

Electrons are subatomic particles that carry a negative charge and are found in the electron cloud surrounding the nucleus of an atom.

Front

What is the number at the top of each square on the periodic table?

Back

The number at the top of each square on the periodic table is the atomic number, which represents the number of protons in an atom's nucleus.

Front

Which element would be in group 16 of the periodic table?

Back

Group 16 of the periodic table includes elements like Oxygen (O) and Sulfur (S). The specific element 'Y' is a placeholder for an element in that group.

Front

What is the best description for alkali metals?

Back

Alkali metals are highly reactive elements found in group 1 of the periodic table, including lithium, sodium, and potassium.

Front

PCl5 + ___ H2O → ___ HCl + H3PO4: What are the coefficients?

Back

The coefficients are 4 for H2O and 5 for HCl, balancing the chemical equation.

Front

What is the atomic mass?

Back

The atomic mass is the weighted average mass of an element's isotopes, measured in atomic mass units (amu).

Front

Define neutrons.

Back

Neutrons are subatomic particles found in the nucleus of an atom that have no charge and contribute to the atomic mass.

Front

What are protons?

Back

Protons are positively charged subatomic particles located in the nucleus of an atom and determine the element's identity.

Front

What are quarks?

Back

Quarks are fundamental particles that combine to form protons and neutrons, the building blocks of atomic nuclei.

Front

What is a chemical symbol?

Back

A chemical symbol is a one or two-letter notation used to represent an element on the periodic table.