Unit 4c. Studyguide

What subatomic particle determines an element's identity?

• Neutron

• Electron

• Proton

• Valence Electron

Which part of an atom contains most of its mass?

• Electron Cloud

• Nucleus

• Valence Shell

• Energy Levels

Which statement best describes elements in the same group (column) on the periodic table?

• They have the same number of protons

• They have the same number of neutrons

• They have the same number of valence electrons

• They have the same atomic mass

What happens to elements as you move from left to right across a period?

• They become more metallic

• They gain more protons and valence electrons

• Their atomic number decreases

• They become less reactive

What type of bond forms between a metal and a nonmetal?

• Covalent

• Ionic

• Metallic

• Hydrogen

Which of the following is a covalent compound?

• NaCl

• CaO

• CO₂

• MgCl₂

Why do noble gases (Group 18) rarely form bonds?

• They have an odd number of protons

• They already have a full outer shell of electrons

• They only bond with metals

• They are unstable and highly reactive

Which of the following would form an ionic bond?

• Oxygen and Nitrogen

• Sodium and Fluorine

• Carbon and Hydrogen

• Chlorine and Oxygen

Which of the following is a correct formula for a covalent compound?

• MgO

• CO₂

• NaCl

• Al₂O₃

Tags

NGSS.MS-PS1-1

What is the correct name for the compound P₂O₅?

• Diphosphorus pentoxide

• Phosphorus oxide

• Pentaphosphorus dioxide

• Phosphorus pentoxide

Tags

NGSS.MS-PS1-1