PS Unit 2 Review 24/25

Which of the following is a metal on the periodic table?

• Helium (He)

• Radium (Ra)

• Chlorine (Cl)

• Neon (Ne)

What do elements in the same group on the periodic table have in common?

• Same atomic mass

• Same number of protons

• Same number of valence electrons

• Same number of neutrons

Which atomic model is considered the most accurate representation of atomic structure?

• Solid Sphere Model

• Chocolate Chip Cooke Model

• Electron Cloud Model

• Bohr Model

What are ions?

• Atoms with the same number of protons

• Atoms that have gained or lost electrons

• Atoms with different numbers of neutrons

• Atoms with the same atomic mass

What defines the atomic number of an element?

• Number of neutrons

• Number of electrons

• Number of protons

• Atomic mass

What are metalloids?

• Elements with properties of both metals and non-metals

• Elements that are gases at room temperature

• Elements that are highly reactive

• Elements that are liquids at room temperature

What is the significance of valence electrons in chemical properties?

• They determine the atomic mass

• They define the atomic number

• They influence chemical properties

• They are not significant

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the function of the nucleus in a cell?

• Provides structure in plant cells

• Controls the cell

• Produces energy

• Synthesizes proteins

Tags

NGSS.MS-LS1-2

Which organelle is known as the powerhouse of the cell?

• Nucleus

• Endoplasmic reticulum

• Mitochondrion

• Cell wall

Tags

NGSS.MS-LS1-2

Which element is mostly found in the Earth's atmosphere?

• Oxygen

• Hydrogen

• Nitrogen

• Carbon