All Chemistry Review I | December '25

Front

What is the electron configuration of Krypton?

Back

1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶

Front

How do you calculate percent error?

Back

Percent Error = |(Estimated Value - Actual Value) / Actual Value| × 100

Front

What does the atomic number of an atom represent?

Back

The atomic number represents the number of protons in its nucleus.

Front

What are periods on the periodic table?

Back

Periods are the rows that go left to right on the periodic table.

Front

Which halogen has the smallest atomic radius?

Back

Fluorine (F) has the smallest atomic radius among the halogens.

Front

Define protons.

Back

Protons are positively charged particles found in the nucleus of an atom.

Front

What is the significance of the periodic table's groups?

Back

Groups are the columns that go top to bottom and contain elements with similar chemical properties.

Front

What is the difference between atomic mass and atomic number?

Back

Atomic mass is the weighted average mass of an atom's isotopes, while atomic number is the number of protons in the nucleus.

Front

What is a noble gas?

Back

Noble gases are elements in Group 18 of the periodic table, known for their lack of reactivity due to having a full valence shell.

Front

Explain the concept of valence electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.