Atoms
What part of an atom has a positive charge and what part of an atom has a neutral charge?
A proton & A neutron
2/3 of the elements are ___________?
Metals
Elements in the same group have similar _________.
Properties.
______________ cannot be created or destroyed.
Matter, mass, atoms.
Evaporation is a substance changing from a ___________ to a _________?
A liquid to a gas
Molecules are made up of ____________
Atoms
________________ have negative charges and arrange themselves in _____________ around the nucleas.
Electrons & Shells
Name one element that has similar chemical properties to oxygen.
What is the scientific formula for Carbon Dioxide?
Any element in group 6.
The periodic table is organized by ______ _______.
Atomic number
Is a piece of clay molded into a teddy bear a physical or chemical change?
A physical change
What state of matter has a fixed volume but a shape that varies?
A liquid
Which two particles are inside the nucleus of an atom?
Protons and Neutrons
In order to stabilize their outer shells, some atoms combine with other atoms and ____________ or give and take ________________.
Share & Electrons
The elements silver and copper are the best _______________
Conductors
What are the letters that represent an element on the periodic table called?
Atomic Symbol
Is a piece of dry ice sublimating into gas a physical or chemical change
A physical change
A material with a large thermal conductivity coefficient is a good _______ and a poor ______.
conductor, insulator.
What is the chemical formula for water?
H2O
Two or more atoms chemically combined are called __________________
Molecules or Compounds
What is a pure substance that cannot be broken down more?
An element
Elements in the same group have the same number of ________ ________.
Valence electrons.
Is the color of an iron bar changing as a result of it rusting a physical or chemical change?
A chemical change
The start of matter depends on how ___________ the molecules are moving and how ___________ they are to each other.
Fast & Close
What is the chemical formula for salt?
NaCl
What is a charged atom called?
An ion
Name the four characteristics of metals
Shiny, ductile, conductive and malleable
Mendeleev created the __________ __________ of the __________.
Periodic table of the elements.
What are the 4 types of chemical reactions?
Decomposition, synthesis, replacement, combustion.
What is the triple point in a phase diagram?
Conditions at which a material is liquid, solid and gas at the same time.
What type of bonds are present in MgSO4?
What is true about all atoms?
Ionic between Mg and SO4, covalent between S and O.