Atoms
Elements
Periodic Table
Matter
Chemical Formulas
100
The number of protons in the ___________ of an atom is the atom's atomic number.
What is nucleus.
100
An ________ is a material that contains only one kind of atom.
What is element.
100
A small particle that makes up most types of matter on Earth
What are atoms.
100
Anything that has mass and takes up space
What is matter.
100
What is the chemical formula for carbon dioxide?
What is CO2
200
Atoms of the same element that have different numbers of neutrons are
What is isotopes.
200
An element that has characteristics of both metals and nonmetals is a
What is metalloid.
200
A pure substance whose smallest unit is made of atoms of more than one element.
What is compound.
200
Two or more substances form a __________ when they come together without forming a new substance
What is mixture.
200
How many hydrogen atoms are in water?
What is 2
300
An atomic particle with no electrical charge is a
What is neutron.
300
Elements that are ___________ are usually shiny and conduct electricity well.
What is metals.
300
Elements that are usually dull in appearance and poor conductors of heat and electricity are
What is nonmetals.
300
Matter that has the same composition and properties throughout is called a
What is a pure substance.
300
What is the chemical formula for salt
What is NaCl
400
An atomic particle NOT found in the nucleus is an
What is electron.
400
Many ____________ can conduct heat and electricity, but they are not the best conductors.
What is metalloids.
400
The elements that are hard and dense
What are the transition metals
400
Boiling is an example this
What is a physical change
400
the chemical formula for methane
What is CH4
500
The number of protons plus the number of neutrons gives the
What is mass number
500
Atoms with a valence of 2
What are alkaline earth metals
500
The monatomic elements
What are the noble gases
500
The two type of pure matter
What are compounds and elements
500
the kind of bond that joins N2
What is a triple bond
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