The density of aluminum is 2.70 g/cm³. What is the mass of a solid piece of aluminum with a volume of 1.50 cm³?

the central part of an atom, containing protons and neutrons

the smallest particle of an element that retains the properties of that element

a positively charged subatomic particle

The nucleus of an atom is ___.

a negatively charged subatomic particle

a subatomic particle with no charge

What is the smallest particle of an atom?

Of the elements Fe, Na, Pt, and Ar, which is a nonmetal?

How many protons are in this ion?

How many neutrons are in this ion?

How many electrons are in this ion?

How many valence electrons are in this atom?

How many electron shells are in this atom?

Which of the following elements is in the same period as phosphorus?

Which of the following elements has the smallest atomic radius?

How many valence electrons are in an atom of magnesium?

Which of the following categories includes the majority of the elements?