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Terms in this set (17)
is a unit of matter or energy that's the fundamental makeup of all matter.
According in modern atomic theory, an atom has a center, or core, called the nucleus atom consists of.
In the nucleus are ________ _______ -- protons and neutrons.
Surrounding the nucleus is a cloud of very small _______ _______ called electrons.
are positively charged particles.
The nuetrons and _______ are found in the center of the atom
are neutral particles.
The _______ and protons are found in the center of the atom
are negatively charged particles.
The ________ circle around the protons and neutrons in a cloud
are one of the smallest particles in nature.
_____ are considered to be neutral because they have an equal number protons and electrons.
Matter is made up of ____.
____have three basic parts: neutrons, electrons, and protons. The neutrons and protons are found in the center of the atom. The electrons circle around the protons and neutrons in a cloud.
atoms of two or more elements are bonded into a more complex structure.
Often a _____ is a formed between two different types of atoms the ionize before bonding.
is the process by which an electrically neutral atom, molecule, or radical loses or gains one or more electrons and becomes an ion.
as atoms approach each other one or more electron jumps from the outer most energy level (valence Level) of one atom to the valence level of the other.
the one that lost one or more electrons becomes positive and is now called a cation.
the atom that gained one ore more electrons becomes negative and id refereed to as a anion.
outer most energy level
A positively charged ion
A negatively charged ion
Formed when one or more electrons are transferred from one atom to another
two or more atoms (of the same or different elements) can overlap their Valance Level thus creates a more complex structure called a molecule.
is an electrically neutral group of two or more atoms held together by chemical bonds.
A pure substance made of only one kind of atom
each of two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei, and hence differ in relative atomic mass but not in chemical properties; in particular, a radioactive form of an element.
the positively charged central core of an atom, consisting of protons and neutrons and containing nearly all its mass.
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