Periodic Table Assessment

Front

What is the atomic number of an element and what does it represent?

Back

The atomic number of an element is the number of protons in the nucleus of an atom. It determines the identity of the element.

Front

How do you determine the number of neutrons in an atom?

Back

The number of neutrons can be determined by subtracting the atomic number from the mass number (Neutrons = Mass Number - Atomic Number).

Front

What are groups in the periodic table?

Back

Groups are vertical columns in the periodic table that contain elements with similar chemical properties and the same number of valence electrons.

Front

What are periods in the periodic table?

Back

Periods are horizontal rows in the periodic table that indicate the number of electron shells in the atoms of the elements.

Front

Which elements belong to the same group in the periodic table?

Back

Elements in the same group have similar properties and the same number of valence electrons, such as Carbon (C) and Lead (Pb).

Front

What is the significance of the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in an atom's nucleus, which helps in identifying isotopes of an element.

Front

What element has the atomic number 8?

Back

The element with atomic number 8 is Oxygen (O).

Front

How can you identify elements in the same period?

Back

Elements in the same period have the same number of electron shells, such as Sodium (Na) and Chlorine (Cl) in Period 3.

Front

What is the relationship between atomic number and element identity?

Back

The atomic number uniquely identifies an element; no two different elements can have the same atomic number.

Front

What are valence electrons and why are they important?

Back

Valence electrons are the electrons in the outermost shell of an atom, and they determine how an element reacts chemically.