Periodic Law

Front

What is the Periodic Law?

Back

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

Front

How are elements arranged in the modern periodic table?

Back

Elements are arranged by increasing atomic number.

Front

What are representative elements?

Back

Representative elements are those found in groups 1, 2, and 13-18 of the periodic table, exhibiting a wide range of chemical and physical properties.

Front

How many valence electrons does an element in group 17 have?

Back

Elements in group 17, like iodine, have 7 valence electrons.

Front

Who created the first periodic table?

Back

Dmitri Mendeleev created the first periodic table, arranging elements by atomic mass.

Front

What is ionization energy?

Back

Ionization energy is the energy required to remove an electron from an atom in its gaseous state.

Front

Which element has a higher ionization energy: Calcium (Ca) or Scandium (Sc)?

Back

Scandium (Sc) has a higher ionization energy than Calcium (Ca).

Front

What is the significance of atomic number in the periodic table?

Back

The atomic number determines the identity of an element and its position in the periodic table.

Front

What are transition elements?

Back

Transition elements are the metallic elements found in groups 3-12 of the periodic table, known for their ability to form variable oxidation states.

Front

What is the general trend of ionization energy across a period?

Back

Ionization energy generally increases across a period from left to right.