PS.4.a Test Correction

Front

What is the element in period 1 group 18?

Back

Helium

Front

What explains why Fluorine, Chlorine, and Iodine are similar?

Back

They have the same number of valence electrons.

Front

What is the mass of the atom with atomic number 14?

Back

14

Front

How is the periodic table organized?

Back

By atomic number.

Front

Elements in the same group share the same number of _____________.

Back

valence electrons.

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is the atomic number of an element?

Back

The number of protons in the nucleus of an atom.

Front

What is the significance of the periodic table?

Back

It organizes elements based on their properties and atomic structure.

Front

What do elements in the same period have in common?

Back

They have the same number of energy levels.

Front

What is a group in the periodic table?

Back

A column of elements that share similar chemical properties.