2. Atoms & Elements

Which subatomic particle is responsible for the identity of an element?

How many protons does a lithium atom have?

Which element has 13 protons in its nucleus?

Which term describes a pure substance that cannot be broken down by chemical means into other substances?

Why does solid aluminum conduct electricity?

Which of the following is the smallest part of an element that still retains the chemical properties of that element?

In an atom, which type of electrons are primarily responsible for shielding the nucleus from the valence electrons?

Which of the following is closest to the mass of an electron?

Steel objects can become temporary magnets because they are mainly composed of which element?

Which statement best explains how the mass of an atom is organized?

Which of the following are defined as the basic units of matter?

If two atoms have the same number of protons in their nucleus, you can conclude for sure that they:

How many protons are present in a neutral atom of sodium (Na)?

Why is it accurate to say that an atom is mostly composed of empty space?

Which of the following best explains what makes a hydrogen atom different from a helium atom?