1) What is the smallest unit of matter? Also know as the building blocks of matter. a) Moleule b) Atoms c) Electrons d) Protons 2) What are two or more atoms that are bonded together called? a) Molecule b) Atoms c) Electron d) Protons 3) Atoms are VERY _______ a) Big b) Long c) Heavy d) Small 4) What are the three parts of an atom? a) Atoms, Molecules, Neutrons b) Protons, Neutrons, Electrons c) Positive, Negative, Neutral 5) Which two parts of an atom make up the atom's nucleus?  a) Protons and Neutrons b) Atoms and Molecules c) Protons and Neptune 6) Which part of an atom is found floating on the outside of the nucleus? a) Protons b) Neutrons c) Electrons  d) Molecules 7) Which part of an atom is positively charged? a) Positive b) Protons c) Neutrons d) Negative 8) Which part of an atom is positively charged? a) Protons b) Neutrons c) Electrons 9) _________ is the ability of an object to float in air or water or another gas or liquid. The higher the object floats, the more it has. (1 pt) a) Buoyancy  b) Matter c) Floating  d) Atoms 10) Mass is added to an object without changing its volume. What happens to the object’s density when this happens? Does its density increase, decrease or does it stay the same? a) Increase b) Decrease c) Stay the same 11) An atom holds itself together because its protons and electrons have ________ that attract each other. a) Electrolytes  b) Charges c) Changes 12) Neutrons have______ charge. a) a really large b) a very small c) no 13) What is the formula for calculating density? a) density = mass x volume b) density = mass ∕ volume c) area = length x width 14) Calculating the number of protons, neutrons, and electrons for an atom can be done easily using a ______. a) Calculator b) Google search c) Asking a friend d) Periodic Table 15) The ______ number is always the atomic number. a) Smaller b) Longer c) Higher 16) _______ tells you the total mass of the atom. a) Atomic Weight b) Atomic Mandates c) Atomic Mass d) Atomic Mess 17) An object’s volume increases, and its mass stays the same. What happens to the object’s density when this happens? Does its density increase, decrease or does it stay the same? a) Increase b) Decrease c) Stay the same 18) True or false? Outside of the nucleus, an atom is mostly empty space. a) True b) Fasle

Atoms, Molecules and Density

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