ps ch 4

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An atom gains energy by absorbing a light particle called a

The average atomic mass of the element cesium is about 133 u . What is the mass of 3 mol of cesium

An elements average atomic mass refers to the weighted average of the masses of all off its naturally occuring

The word atom comes from a greek word that means

A region in which there is a high probability of finding an electron is called an

Isotopes have the same atomic _____________ but different atomic ______________

Which of the following statements about the modern model of the atom is true

The number of particles in one mole of a substance is referred to as