atoms and elements
what is an atom?
The smallest unit of an element.
what is the periodic table?
The chart that organizes all the elements?
what is an ion?
An atom with a charge
the formula of water
H2O
A bond formed when atoms share electrons
Covalent bond
what is a proton?
The positively charged particle I an atom
Whats the atomic number?
The number of protons in an atom
what is a cation?
an ion with a positive charge.
the formula of carbon dioxide
CO2
A bond formed when electrons are transferred
Ionic bond
what is a neutron?
The particles with no charge
what is a group?
Elements in the same column
what is an anion?
An ion with a negative charge.
The formula for table salt
NaCl
Metals usually form this type of bond with nonmetals
Ionic bond
What is an electron
The negatively charged particle.
what is a period?
Elements in the same row
an atom becomes positive when it does this to electrons?
loses electrons
how many hydrogen atoms are in H2O
2
Nonmetals usually form this type of bond with other nonmetals
covalent bond
what is the nucleus ?
the center of an atom?
What is group 1?
The group containing very reactive metals like sodium and potassium.
An atom becomes negative when it does this to electrons
gains electrons
How many oxygen atoms are in CO2?
2
In an ionic bond, electrons are usually ____ from one atom to another.
Transferred