Chapter 2 Practice

What is the difference between an element and a compound?

• An element is a pure substance made up of only one type of atom, while a compound is a substance made up of two or more different types of atoms chemically bonded together.
• An element is a mixture of different substances, while a compound is a pure substance
• An element and a compound are the same thing
• An element is made up of two or more different types of atoms, while a compound is made up of only one type of atom

Whereas essential elements are required in large amounts by organisms, _____ elements are only needed in very small quantities.

Match the subatomic particles with their correct charges:

• Proton (+1), Neutron (0), Electron (-1)

• Proton (+1), Neutron (+1), Electron (-1)

• Proton (-1), Neutron (0), Electron (+1)

• Proton (0), Neutron (+1), Electron (-1)

Protons and Neutrons are located in the _______ of an atom.

An atom that has gained or lost an electron is known as an ___.

The atomic mass of an element is determined by its:

• Protons

• Neutrons

• Electrons

• Ions

An element's atomic number is equal to its:

• Protons

• Electrons

• Neutrons

• Isotopes

Isotopes are elements that differ in their number of:

• protons
• valence electrons
• neutrons
• electrons

A ________ bond is formed when two atoms share electrons.

Tags

NGSS.HS-PS1-1

An _____ bond is formed when electrons are transferred from one element to another, creating ions.