2. Atoms & Elements

Which of the following is the number of protons in a neutral atom of chromium (Cr)?

An atom has a mass number of 32 and 17 neutrons. What is the atomic number of this atom?

How many protons and electrons are present in a neutral atom of strontium (Sr)?

Which of the following is the number of protons in a boron atom?

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?