The Atom
Which of the following particles has a negative charge?
A. Proton B. Neutron C. Electron D. Alpha particle
C. Electron
Rows of the periodic table are called ____________.
Periods
What is the atomic mass of chlorine?
35.453
Anything that has mass and takes up space.
The ______________ tells you the number of protons in the nucleus of each atom of that element.
The __________ is the particle found in the nucleus of the atom with a positive charge.
Proton
Columns of the periodic table are called ___________.
Groups
Elements that are dull in appearance and poor conductors of heat and electricity are known as ________.
Nonmetals
What is a compound?
A combination of two or more elements.
What is the mass number?
The number of protons plus the number of neutrons it contains.
In an atom, where is the electron located?
In the electron cloud that surrounds the nucleus.
What is the atomic number of Carbon?
6
Which category of element is found between the metals and nonmetals?
Metalloids
What is an element?
Matter made up of one type of atom.
What is an element?
Matter of only one kind of atom.
Which particles are found in the nucleus of the atom?
Protons and neutrons
What is the atomic number of Neon?
10
Which of the following is a characteristic that is typical of a nonmetal element?
A. Shiny B. Brittle C. Good conductor of heat D. Good conductor of electricity
B. Brittle
What is a mixture?
When two or more substances (elements or compounds) come together but don't combine to make a new substance.
Which particle in the atom has no charge?
Neutron
What is an atom?
A small particle that makes up most types of matter.
What is the atomic number of Oxygen?
8
Elements that are shiny, malleable, ductile, good conductors of heat and electricity, and make up most of the periodic table are known as _________.
Metals
What are the two types of mixtures?
Homogeneous and heterogeneous
___________ are two or more atoms of the same element that have different numbers of neutrons.
Isotopes