Which type of nuclear decay causes the ejection of two protons and two neutrons from the nucleus of an atom?

Which type of radiation consists of electromagnetic waves of extremely high frequency and energy?

What is a measure of the rate of radioactive decay?

Each row of the periodic table is a ?

The first column of the periodic table contains the ?

The process that occurs when an atom splits into two smaller atoms is nuclear ?

Valence electrons are in the ? electron shell.

Most of the elements are hard, dense, shiny solids called

Graphite and diamond are forms of

The principle that most atoms tend to react to obtain eight valence electrons is the ?

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