Chapter 3 quizziz

What was John Dalton's Atomic Theory?

• Atoms are made of three types of particles

• All matter is made of atoms that cannot be divided or destroyed

• The very small charged nucleus, containing much of the atom's mass, is orbited by low-mass electrons

The group of elements that have the same properties as metals and nonmetals?

• Noble gasses

• Alloys

• Metalloids

• Actinides

In Rutherford's experiment, what were Alpha particles radiated on?

• Aluminum foil

• Pitchblende

• Gold foil

• Compounds

What happened when Alpha particles were radiated on gold foil in Rutherford's experiment?

• The particles passed through because of the electron cloud

• The particles were stopped by the charge of the electrons

• The particles passed through because of the nucleus

• The particles were stopped by the charge of the protons

What group of elements are man-made?

• Alloys

• Metalloids

• Noble gasses

• Actinides

What group of elements have properties of metals and non-metals?

• Halogens

• Metalloids

• Noble gasses

• Actinides

Elements at the bottom of the periodic table are _______ reactive than elements at the top of the periodic table?

• more

• less

• the same

What happens to the size of the radius of an atom as you move to the right on the periodic table?

• increases

• decreases

• stays the same

What is the atomic mass of Einsteinium?

• 99

• 5f^11 7s^2

• 252.083

What is the atomic number of Hafnium?

• 72

• 4f^14 5d^2 6s^2

• 178.49