Science Quiz on Atomic Structure and Properties

What distinguishes one element from another on the periodic table?

• The number of neutrons in the nucleus

• The total number of particles in the atom

• The number of protons in the nucleus

• The types of chemical bonds it forms

Why do different substances have different melting points?

• The size of the individual atoms in the substance

• The arrangement and strength of bonds between particles

• The shape of the molecules in the substance

• The temperature at which the substance was formed

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Which statement best describes the relationship between models and the structure of an atom?

• Models perfectly represent the exact structure of an atom

• Models simplify complex systems to make predictions about atomic behavior

• Models are unnecessary because atoms are too small to study

• Models are used only for visualizing electrons

Tags

NGSS.MS-PS1-1

The melting point of water is 0°C, and the melting point of salt is 801°C. What does this difference indicate about the particles in each substance?

• Salt particles are smaller than water particles

• Salt has stronger bonds between particles than water

• Salt particles move faster at room temperature than water

• Water has more mass than salt

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

Why are metals good conductors of electricity?

• Metals contain free-moving protons that carry energy

• Metals have free-moving electrons that allow energy to flow

• Metals are dense, so they absorb energy quickly

• Metals do not interact with heat or light energy

Tags

NGSS.HS-PS1-1