Unit 1-6 Review

Front

What is a hypothesis in the scientific method?

Back

A hypothesis is an educated guess or prediction that can be tested through experimentation.

Front

Which element has a smaller atomic radius: potassium (K) or bromine (Br)?

Back

Bromine (Br) has a smaller atomic radius than potassium (K).

Front

How many neutrons does the isotope of lithium have if its atomic mass is 8 and its atomic number is 3?

Back

The isotope of lithium has 5 neutrons (8 - 3 = 5).

Front

How many valence electrons does magnesium have in its Lewis dot model?

Back

Magnesium has 2 valence electrons.

Front

What is the conclusion in the scientific method?

Back

The conclusion is the step where the hypothesis is stated as correct or incorrect based on the data analysis.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance made of only one type of atom, while a compound is made of two or more different types of atoms chemically bonded together.

Front

What is the significance of valence electrons in chemical bonding?

Back

Valence electrons are important because they determine how an atom can bond with other atoms to form molecules.

Front

What is the scientific method?

Back

The scientific method is a systematic process for investigating phenomena, acquiring new knowledge, or correcting and integrating previous knowledge.

Front

What is an isotope?

Back

An isotope is a variant of a chemical element that has the same number of protons but a different number of neutrons.