Chemistry-1

Front

What is the atomic number of an element?

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 charge of a proton?

Back

A proton has a positive charge of +1.

Front

What is the charge of a neutron?

Back

A neutron has no charge; it is neutral.

Front

What is the charge of an electron?

Back

An electron has a negative charge of -1.

Front

What are the vertical columns on the periodic table called?

Back

Groups or families.

Front

What is a metalloid?

Back

Metalloids are elements that have properties of both metals and nonmetals.

Front

What is the significance of the periodic table?

Back

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

Front

What is an isotope?

Back

Isotopes are atoms of the same element that have the same number of protons but different numbers of neutrons.

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

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.