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Chemistry Test

Text Questions

Matter Anything that has mass and takes up space
Element Substance consisting of atoms which all have the same atomic number/ same number of protons
Compound A substance formed when 2 or more chemical elements are chemically bonded together
Atom Smallest unit of matter
Nucleus The central part of an atom that contains protons and neutrons
Protons Positively charged atom found in the nucleus
Neutrons Neutrally charged atom found in the nucleus
Electrons Negatively charged atom found floating around the nucleus
Energy Level The fixed energies an electron can have
Valence Electrons Electrons found on the outermost shell of an atom
Atomic Number The number of protons in the nucleus of an atom
Period Horizontal row of elements that have the same number of shells
Group Vertical columns of elements that share similar characteristics
Ion Atoms with a charge
Polyatomic ion 2 or more atoms covalently bonded
Ionic Bond A chemical bond between 2 ions with opposite charges (e.g. NaCl)
Subscript The number of atoms in a molecule (H2O. There are 2 hydrogen atoms)
Chemical Formula Tells the number of atoms of each element in a compound.
Created by: booknerd237