Matter and Energy Chap. 13 Test

In a classroom, Charlotte and Michael are arranging their books on a shelf. What idea states that no two books can occupy the same space at the same time, similar to how no two electrons in an atom can have the same set of four quantum numbers?

• quantum theory

• quark theory

• Pauli exclusion principle

• Heisenberg uncertainty principle

Which of the following is not a principle of the atomic theory?

• All atoms are made of subatomic particles.

• Different elements have different properties because their atoms are different.

• All atoms of a particular element have the same properties.

• Chemical processes are the result of the rearrangement, combination, or separation of atoms.

Evelyn is organizing her chemistry notes and needs to label the element Sodium with its correct symbol. Can you help her find the right one?

• Ag

• Au

• K

• Na

• O

During a science experiment, Benjamin observed a metal that remained liquid at room temperature. What is the only metal that is liquid at room temperature?

• yttrium

• mercury

• technetium

• manganese

Kai and Luna are discussing chemistry. Kai asks, "What are atoms of the same element that have different mass numbers?"

• isobars

• isomers

• isoatoms

• isotopes

Liam is organizing his chemistry notes and needs to label the elements with their correct symbols. Can you help him match the element with its correct symbol: Oxygen

• Ag

• Au

• K

• Na

• O

Aiden is conducting an experiment with unstable atoms in his lab. During the experiment, he observes that an atom ejects a clump of two protons and two neutrons. What type of nuclear decay is Aiden observing?

• alpha decay

• beta decay

• gamma decay

• delta decay

David is conducting an experiment with a radioactive sample in his science class. He wants to know the term that refers to the time required for one half of the sample to decay into a new substance. This term is called _____

Kai is studying different types of radioactive decay in his science class. He learns about a type of decay that releases energy without changing the number of protons and neutrons. What type of decay is this?

• alpha decay

• beta decay

• gamma decay

• delta decay

Scarlett is in a science class and her teacher asks her to identify the correct symbol for Gold from the periodic table. Can you help Scarlett by choosing the correct symbol for Gold?

• Ag

• Au

• K

• Na

• O