Match each vocabulary word with its definition. match the items in the left column to the items in the right column. 1. one mole of any gas at stp will occupy 22.4 l atomic mass 2. the sum of the protons and neutrons in an atom mole 3. 6.02 x 1023; the number of atoms, molecules, or particles in a mole mass number 4. atoms of the same element that have different numbers of neutrons avogadro's hypothesis 5. the relative mass of an atom as compared to the carbon-12 atom isotopes 6. the amount of a substance that contains the same number of atoms, molecules, or particles as 12 g of carbon-12 avogadro's number 7. the mass of an element or molecule in grams per mole (g/mol) molar mass

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1. one mole of any gas at stp will occupy 22.4 l : avogadro's hypothesis

2.  the sum of the protons and neutrons in an atom: Mass number

3. 6.02 x 1023; the number of atoms, molecules, or particles in a mole : avogadro's number

4. atoms of the same element that have different numbers of neutrons : isotopes

5. the relative mass of an atom as compared to the carbon-12 atom: molar mass

6. the amount of a substance that contains the same number of atoms, molecules, or particles as 12 g of carbon-12: mole

7. the mass of an element or molecule in grams per mole (g/mol): atomic mass

Explanation:-

According to avogadro's law, 1 mole of every substance occupies 22.4 Liters at STP and contains avogadro's number of particles.

Avogadro's number of substance represents 1 mole and thus weigh same as molecular mass called as molar mass. Molar mass is expressed in g/mol.

Protons are nucleus are located in the center of an atom where while mass of an atom is concentrated.

Mass number = Number of protons + Number of neutrons

Mass number is a whole number.

Isotopes are the atoms of same element with same atomic number but different mass number. Thus they have same protons but different number of neutrons.

Atomic mass is calculated by:. It is a integer.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-