Chapter 1 - Elements and the Periodic Table

What is Dalton's atomic theory?

• All matter is composed of small, indivisible particles called atoms.
• Atoms are not the basic building blocks of matter.
• All matter is composed of large, divisible particles called atoms.
• Atoms are made up of even smaller particles called molecules.

How many protons and neutrons are in potassium?

• 21 protons and 18 neutrons
• 19 protons and 20 neutrons
• 20 protons and 19 neutrons
• 18 protons and 20 neutrons

How many protons and electrons are in the element Copper (Cu)?

• 29 protons and 29 electrons

• 20 protons and 20 electrons

• 32 protons and 29 electrons

• 35 protons and 29 electrons

What is Rutherford's atomic model?

• Rutherford's atomic model states that the atom is composed of a negatively charged nucleus, which contains positively charged electrons that surround the nucleus in orbits.

• Rutherford's atomic model is based on the idea that the atom is a solid, indivisible sphere, which contains fixed orbits.

• Rutherford's atomic model describes the atom as a small, dense, positively charged nucleus surrounded by negatively charged electrons that revolve in circular paths known as orbits.

• Rutherford's atomic model proposes that the electrons are located in fixed orbits around the nucleus.

Which group does chlorine (Cl) belong to?

• Earth metal

• Alkali metal

• Noble gases

• Halogen

What is a Lewis diagram?

• A diagram that represents the energy levels of an atom using colors
• A diagram that represents the valence electrons of an atom using dots
• A diagram that represents the movement of electrons within an atom
• A diagram that represents the internal structure of an atom using lines

Which of the following images is the correct Bohr structure for Boron (B)?

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Which group does the element sodium (Na) belong to?

• Alkali metals

• Noble gases

• Alkaline earth metals

• Halogens

What is atomic mass?

• The average mass of an element calculated through the mass of protons and electrons, subtracted by the average amount of neutrons based on abundance of isotopes

• The average mass of an element calculated using the mass of all the protons, neutrons, electrons and the relative abundance of isotopes

• The volume of an atom in terms of all the protons, neutrons, electrons and the relative abundance of isotopes in the element

• The weight of the element based on how much it weighs in space

What is the atomic number of oxygen (O)?

• 6
• 8
• 10
• 12