HU02A Unit Exam Review

What is the main effect of changing the number of electrons in an atom?

• changes the element
• changes the mass only
• changes the charge only

What model of the atom?

• quantum model of the atom
• Bohr's model of the atom
• de Broglie's model of the atom
• Rutherford's planetary or nuclear model of the atom

TRUE or FALSE:  In Dalton's Atomic Theory, he claimed that "All matter is composed of atoms".  Is this still considered true?

• True 
• False

Which subatomic particle(s) are in the region around the nucleus?

• electrons
• protons
• neutrons
• protons and neutrons

Which group of elements are the most reactive nonmetals?

• halogens
• alkali metals
• alkali earth metals
• noble gases

Elements in group 1A will form ions with what charge?

• +1
• +2
• -2
• -1

How much bigger is the atom compared to the nucleus?

• 10 times bigger
• 100 times bigger
• 1000 times bigger
• 100 000 times bigger

What model of the atom?

• quantum model of the atom
• Bohr's model of the atom
• de Broglie's model of the atom
• Rutherford's planetary or nuclear model of the atom

TRUE or FALSE:  In Dalton's Atomic Theory, he claimed that "Compounds are formed by the combination of two or more different kinds of atoms".  Is this still considered true?

• True 
• False

What is the main effect of changing the number of protons in an atom?

• changes the element
• changes the mass only
• changes the charge only