What particle lives on the energy levels?
what are electrons
what is the atomic number of hydrogen
what is 1
what particle has a no charge
what is a neutron
Definition of density
what is the measurement of how tightly a material is packed together
Is cooking an egg Physical or chemical change
what is chemical change
What electron are on the outermost shell?
What are Valence electrons
what elements make up water
what is hydrogen and oxygen
what particle has a negative charge
what is a electron
definition of a compound
what is a material formed by chemically bonding 2 or more chemical elements
Is rusting chemical of physical change
what is chemical change
Between a period and a group which indicates how many energy levels there are?
what is a group
what is the atomic number of hydrogen
How many neutrons is in the element phosphorus have
what is 15
what particle has a positive charge
what is a proton
definition of a mixture
what is a combination of 2 or more substances not chemically combined
Is Ripping paper physical or chemical change
what is physical change
How do you know how many electrons are supposed to be on the bohr model?
What is the atomic number
what is the atomic number of lithium
what is 3
what particles live in the nucleus
what is protons and neutrons
definition of a physical change
what is when it changes shape,texture or shape
Is Melting a candle physical or chemical change
what is physical change
Who created the bohr model?
who is Niels Bohr
what is the symbol of this element, sodium
what is Na
is the atom visible to the naked eye
what is no
Definition of element
what is A substance that cannot be broken down into simpler substances
Is baking a cake Physical or chemical change
What is a chemical change