Basic Concepts
The central part of an atom containing protons and neutrons.
What is the nucleus?
The atomic number represents the number of these particles in an atom.
What are protons?
The basic building block of matter; made of electron(s), proton(s), and neutron(s)
What is atom?
Who created the first version of the periodic table?
Dmitri Mendeleev
Two or more atoms bonded together
What is a molecule?
The negative subatomic particle that orbits the nucleus.
What is an electron?
The element with atomic number 6, commonly known as the basis for organic life.
What is carbon?
The smallest unit of a compound
What is molecule
What does each box on the periodic table represent?
An element
The chemical formula shows
What are the The types and number of atoms in a molecule?
The positively charged particle found in the nucleus.
What is a proton?
This element has an atomic number of 1 and is the lightest and most abundant element in the universe.
What is hydrogen?
Solid material whose atoms are arranged in an ordered pattern
What is a Crystal?
Elements are arranged by increasing what?
Atomic number
What does the subscript "2" in H₂O mean?
here are 2 hydrogen atoms
The neutral particle in the nucleus with no charge.
What is a neutron?
An atom of gold has this atomic number.
What is 79?
Anything with both volume and mass
What is Matter?
What information can be found in a periodic table square?
Atomic number, element symbol, atomic mass
Is O₂ an element or a molecule?
A molecule of the same element)
The primary force that holds the nucleus together despite the repulsion between protons.
What is the strong nuclear force?
The sum of protons and neutrons in the nucleus gives this number for an atom.
What is the mass number?
Matter with consistent properties throughout
What is a substance?
What do elements in the same column (group) have in common?
Similar chemical properties
What happens when atoms bond together?
They form molecules