Chemistry Quiz 1 Review

This is a picture of an atom. Inside the nucleus you will find

• positively charged particles only

• negatively charged particles only

• both positively and negatively charged particles

• positively and neutrally charged particles

Ernest Rutherford's discovery regarding atoms led to the following understanding

• That atoms consist mostly of empty space with protons orbiting a nucleus containing electrons and neutrons

• That atoms consist of mostly empty space with neutrons orbiting a nucleus containing electrons and protons

• That atoms consist of mostly empty space with electrons orbiting around a nucleus containing protons and neutrons.

• That atoms are a cloud with electrons, neutrons and protons floating aimlessly around.

Which is true of an electron?

• It has a negative charge and has much less mass than a proton

• It has a neutral charge and has much less mass than a proton

• it has a positive charge and much more mass than a proton

• It has a negative charge and much more mass than a proton

Letter X refers to the _____________ in this atom

• neutrons

• protons

• electrons

• nucleus

Letter Y refers to the ____________ in this atom

• neutrons

• protons

• electrons

• nucleus

Letter Z refers to the _________________ in this atom.

• neutrons

• protons

• electrons

• nucleus

Letter W refers to the _________________ in this atom.

• neutrons

• protons

• electrons

• nucleus

Which element is represented by the atom? (Hint: use your periodic table!)

• Carbon

• Nitrogen

• Boron

• Oxygen

An element of Magnesium has 12 neutrons and 12 protons. What is the MASS of its nucleus?

• +12

• -12

• +24

• -24

An atom of a certain element has 22 protons, 22 electrons and a mass number of 48. How many neutrons does it have?

• 44 neutrons

• 26 neutrons

• 22 neutrons

• none of these are correct