Atomic Structure and Chemical Bonds

Science Journal: Household glue is similar to chemical bonds because both:

• hold things together

• are made of water

• are used in cooking

• are found in nature

What is the smallest part of an element that keeps all the properties of that element called?

• Molecule

• Atom

• Electron

• Proton

What is the area of space around the nucleus where an atom's electrons are most likely to be found called?

• Electron dot diagram

• Chemical bond

• Electron cloud

• Energy level

The nucleus of an atom contains _______ and _______.

• protons and neutrons

• electrons and protons

• neutrons and electrons

• protons and photons

Which of the following statements is true according to the passage?

• Electrons have a positive charge

• The nucleus of an atom has a positive charge

• Planets have charges

• Electrons travel in well-defined orbits

According to the passage, why is it impossible to calculate the exact position of any one electron?

• Because electrons do not travel in predictable orbits and scientists use a mathematical model to predict where an electron is most likely to be.

• Because electrons are too large to be observed directly with current technology.

• Because electrons are always stationary and do not move at all.

• Because electrons are only found in the nucleus of an atom.

Identify the energy level that can hold the most electrons.

• First energy level

• Second energy level

• Third energy level

• Fourth energy level

how many protons, neutrons, and electrons does a neutral lithium atom have?

• A neutral lithium atom has three protons, four neutrons, and three electrons.

• A neutral lithium atom has two protons, three neutrons, and two electrons.

• A neutral lithium atom has three protons, three neutrons, and four electrons.

• A neutral lithium atom has four protons, three neutrons, and three electrons.

What are the areas called where electrons are found at different distances from the nucleus?

• Energy levels

• Protons

• Neutrons

• Isotopes

Identify the energy level with the least energy and the energy level with the most energy.

• The energy level with the least energy is energy level 1. The energy level with the most energy is energy level 4.

• The energy level with the least energy is energy level 4. The energy level with the most energy is energy level 1.

• The energy level with the least energy is energy level 2. The energy level with the most energy is energy level 3.

• The energy level with the least energy is energy level 3. The energy level with the most energy is energy level 2.