Science Cemistry Test
Terms in this set (70)
All matter is made of atoms. Atoms are indivisible and indestructible.
All atoms of a given element are identical in mass and properties.
Compounds are formed by a combination of two or more different kinds of atoms.
Smallest of an atom.
Small, positively charged particle in the nucleus.
Small particle in the nucleus of an atom with no electrical charge.
Tiny, negatively charged particle that moves around the outside of the nucleus of an atom.
The smallest piece or part of a substance.
A state of matter that has a definite shape and volume.
A state of matter that has no definite shape but a definite volume.
A state of matter with no definite shape or volume.
A table that lists all the known elements.
Electrons furthest away from the nucleus of the atom.
Involved in the transfer or sharing of protons in chemical reactions.
Chemical substances that are pure substances and are composed of only one type of atom.
A shorthand way to represent the name of an element.
When a chemical symbol is written the first letter is always capitalized and the second letter is NEVER capitalized.
Found in table salt, used on some street lights.
Used in cement, necessary for healthy bones.
Necessary for human life, makes up 20% of the air we breathe.
Elements in the same vertical column of the periodic table, also called a family.
The groups are called metals, nonmetals, and metaloids.
Elements with similar properties, in the same vertical column of the periodic table, also called a group.
Highly reactive metals.
Alkaline Earth Metals
2nd most reactive metals.
2nd to the left
Less reactive metals.
Middle of Table
Highly reactive nonmetals.
2nd to the right
Almost completely non-reactive gases.
A horizontal row of elements in the Periodic Table
Elements with the properties of metal.
Metalic luster (shine).
Generally solids at room temperature.
Conduct heat and electricity.
Exist as extended planes of atoms.
Combine with other metals to form alloys which have metallic charicteristics.
Elements that lack most of the properties of metal.
Rarely have metalic luster (shine).
Generally gasses at room temperature.
Neither malleable or ductile.
Poor conductors of heat and electricity.
Usually exist as molucules in their element form.
Combine with other Nonmetals to form covalent bonds.
Generally form negitive ions.
Has properties of both Metals and Nonmetals.
Generally look metalic but are brittle, (not malleable or ductile).
Neither good conductors or insulators; instead the are semi-conductors
Highly reactive metals
Groups 1 and 2.
Less reactive metals
Highly reactive nonmetals
Groups 16 and 17.
Less reactive nonmetals
A substance made of only one kind of matter and having definite properties.
The sharing or transfer to form chemical compounds.
A combination of two or more atoms.
A substance made of two or more different elements.
The properties of a compound are very different than the properties of the elements that make up the compound.
Two or more substances that are mixed together, but are not chemically combined.
A mixture that is uniformly dissolved in a liquid or gas.
Properties of compounds can change without involving a change in chemical composition. (Melting and boiling point)
A change in substance that does not change its identity. (Solid to a liquid)
The amount of heat in an object.
The amount of matter in an object.
The ability or power to conduct or transmit heat, electricity, or sound.
The ease with which an element or compound combines with other elements and compounds.
The pigment or hue of a substance.
The temperature at which a substance changes from a liquid to a gas.
The temperature at which a substance changes from a liquid to a solid.
A property used to characterize substances in reactions that change their identity
A change in which one or more substances combine or break apart to form new compounds.
A formula indicating the numbers and types of atoms in a molecule.
A substance participating in a chemical reaction; the before substance.
A substance that is formed as the result of a chemical reaction.
A process in which substances undergo chemical changes, forming new substances with different properties.
Conservation of mass
Matter cannot be created or destroyed in a chemical reaction.
When a gas is released from the chemical combining of 2 substances.
When a solid is released from the chemical combining of 2 substances.
The ease at which a substance will burn.
Does the bonding.
Protons, Neutrons, Electrons.
Found in the nucleus of an atom. They are positively charged and have mass. All atoms of a particular element have the same number of protons.
Constantly move in energy levels, or electron shells, within the electron cloud. There are 7 energy levels in the electron cloud. Each level has a maximum number of electrons that it can hold.
Found in the nucleus of an atom. Neutrons are neutral and have the same mass as a proton.
Equal to the number of protons in an atom.
Equals the total number of protons and neutrons in an atom.