Atoms
Atoms are composed of these 3 subatomic particles?
Must get all 3 for points*
protons, neutrons, and electrons
What is the Substance made up of only one kind of atom?
Element
Two hydrogen atoms and one oxygen molecule make up one molecule of _____
water
The chemical symbol for water.
H2O
The 3 states of matter.
Must get all 3 for points*
solid, liquid, gas
Particle with a neutral charge in an atom.
neutron
H is the chemical symbol for this element.
Hydrogen
The number of sodium atom in table salt. Hint: the symbol for table salt is NaCl
1 sodium atom
Chlorine has seven valence electrons, which it is highly resistant to giving up. This makes it _____reactive and more likely to form compounds with other elements.
a. More
b. less
b. less
The element with atomic number 6.
Carbon
Center of the atom that makes up most of the atom's mass.
Nucleus
The number of hydrogen atoms in a molecule of H2.
2 atoms
Sulfur hexafluoride is a ________
molecule
The 2 in the chemical formula H2O means this.
two atoms of hydrogen
Term used to describe the point when a liquid turns to a gas
boiling point
Particles located in the nucleus of an atom.
Must get both to get points*
Protons and neutrons
_________ electrons are responsible for the chemical reactions that an element can participate in, as well as its reactivity
Valence
True or False: Molecules are multiple atoms held together by atomic bonds
True
The chemical formula for carbon dioxide.
CO2
The term used to describe the point at which a solid becomes a liquid.
melting point
The number of protons a hydrogen atom has.
1 proton
Atoms are made of electrons, neutrons and protons. What are these subatomic particles made of?
Energy
The number of carbon atoms in carbon dioxide.
The chemical formula for table salt.
NaCl
What is the 4th state of matter?
Plasma