BARBARA 2026 FINAL ASSESSMENT STUDY
GUIDE QUESTION BANK VERIFIED ANSWERS A+
◉ Matter exists in 3 states: 1,2,3. Answer: Liquid, gas, and solid.
◉ What is an element? Answer: An element is matter that is
composed of atoms tat have the same number of positive charges in
their nuclei.
◉ What elements make up 96% of the body weight? Answer:
Carbon, hydrogen, oxygen, and nitrogen.
◉ What are elements composed of? Answer: Atoms.
◉ What is an atom? Answer: Atom is the smallest unit of an element.
◉ What is an atom composed of? Answer: A proton, neutron, and
electron.
◉ Where are the protons and neutrons located? Answer: In the
nucleus.
, ◉ Protons carry a _____ charge. Answer: Positive electric charge.
◉ Neutrons carry _______ charge. Answer: No electrical charge.
◉ Electrons carry a ______ charge. Answer: Negative electrical charge.
◉ ______ is the simplest and smallest atom. Answer: Hydrogen.
◉ What is a compound? Answer: If a molecule is built from two or
more different elements.
◉ What is the atomic number? Answer: The number of protons in
the nucleus.
◉ How is the atomic mass determined? Answer: By adding the
numbers of the protons and neutrons in the nucleus.
◉ What is an isotope? Answer: A different form of the same atom.
◉ Describe an isotope. Answer: Often unstable, and their nuclei
break down, or decay, giving off energy.