Unit 3 Test Review

Front

What are Alkali Metals?

Back

Alkali Metals are a group of highly reactive metals found in Group 1 of the periodic table. They have one valence electron, are shiny, silver in color, and are soft enough to be cut with a knife.

Front

Where are metals located on the periodic table?

Back

Metals are primarily located on the left side and in the center of the periodic table, often represented in blue.

Front

Who proposed the discovery of the electron?

Back

J.J. Thomson is credited with the discovery of the electron.

Front

What must an atom contain to be electrically neutral?

Back

An atom must contain the same number of protons and electrons to be electrically neutral.

Front

What is a Halogen?

Back

Halogens are a group of elements found in Group 17 of the periodic table, known for being highly reactive nonmetals. An example is Bromine.

Front

What is the atomic number?

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 protons and neutrons?

Back

Protons are positively charged particles found in the nucleus, while neutrons are neutral particles that also reside in the nucleus.

Front

What is the significance of valence electrons?

Back

Valence electrons are the outermost electrons of an atom and are crucial in determining how an element reacts chemically.

Front

What are Transition Metals?

Back

Transition Metals are elements found in Groups 3-12 of the periodic table, known for their ability to form various oxidation states and colored compounds.

Front

What is the periodic law?

Back

The periodic law states that the properties of elements are a periodic function of their atomic numbers.