Elements
What is an element?
A substance made of one type of atom.
What is a compound?
A substance made of two or more different elements.
100: What is the smallest unit of an element?
Answer: An atom.
100: What is the symbol for oxygen?
O
100: Is gold (Au) an element or compound?
E
Name one element.
vary
200: Name one common compound.
Answer: Water, salt, or carbon dioxide.
200: What are the three main parts of an atom?
Answer: Protons, neutrons, and electrons.
200: What is the symbol for carbon?
C
200: Is water (H₂O) an element or compound?
C
How many types of atoms make up an element?
1
300: How many different elements are needed to make a compound?
Answer: Two or more.
300: Which particle has a positive charge?
Answer: Proton.
300: What does H₂O represent?
Water
300: Is oxygen (O₂) an element or compound?
Answer: Element.
What element has the symbol Na?
Sodium
400: What compound is made from sodium and chlorine?
Answer: Sodium chloride (NaCl).
400: Which particle has a negative charge?
Answer: Electron.
400: What does the small ₂ in H₂O tell you?
Answer: There are 2 hydrogen atoms.
400: Is carbon dioxide (CO₂) an element or compound?
Answer: Compound.
What element has the symbol Fe?
Iron
500: What two elements make up carbon dioxide?
Answer: Carbon and oxygen.
500: What is the center of an atom called?
Answer: Nucleus.
500: How many oxygen atoms are in CO₂?
Answer: 2 oxygen atoms.
500: Is NaCl an element or compound?
Answer: Compound.