8th grade Periodic table

Front

What group of the periodic table contains elements with 5 valence electrons?

Back

Group 15, which includes elements like Nitrogen (N), Phosphorus (P), and Arsenic (As).

Front

What is the central region of an atom called?

Back

The nucleus, which contains protons and neutrons.

Front

How many electrons can the first energy level of an atom hold?

Back

2 electrons.

Front

What is the atomic number of an element with three protons?

Back

3.

Front

What is the difference between atomic number and mass number?

Back

Atomic number is the number of protons, while mass number is the total number of protons and neutrons.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means.

Front

What is the periodic table?

Back

The periodic table is a tabular arrangement of elements organized by increasing atomic number and grouped by similar chemical properties.

Front

What is an atom?

Back

An atom is the smallest unit of matter that retains the properties of an element.

Front

What are protons?

Back

Protons are positively charged particles found in the nucleus of an atom.