Metals
Most metals are
Solid
The element that is the basic building block of all the compounds is
Carbon
The tiny particles of which all matter is composed
Atoms
The number of protons an atom has
Atomic Number
The weight of an object changes from place to place
True
The densest of the everyday metals is
Lead
The halogen that is added to toothpaste and drinking water is
Fluorine
The tiny, extremely dense core at the center of an atom
Nucleus
Lacking an electrical charge
Neutral
A mixture is a substance composed of one or more types of atoms bonded together
False- Compound
The only metal that is liquid at room temperature is
Mercury
The halogen that is useful as a bleach and a germ-killing agent is
Chlorine
The tiny particles that swarm at tremendous speeds around the core of an atom
Electrons
The simplest kind of atom with one proton and one electron
Hydrogen
Two or more atoms firmly bound together form a neutron.
False- Molecule
The semimetal that is used to make computer chips is called
Silicon
The colorless, odorless gas that makes up 78% of the earth's atmosphere is
Nitrogen
Formed by electrons zooming around the nucleus of an atom
Electron Cloud
The elements which do not combine with anything else except under unusual circumstances
Noble Gases
The proton has a negative charge.
False- Positive
A very hard metal which is an important ingredient in stainless steel is
Nickel
The halogen that is added to table salt to prevent a deficiency disease is
Iodine
The two particles that make up the nucleus of an atom
Protons and Neutrons
Highly reactive elements that tend to form compounds with alkali and alkaline earth metals
Halogens
Two electrons attract each other.
False- Repel