Ionic Compounds and Metals - Ion Formation

Multiple Choice

Which of the following statements about valence electrons is correct?

• They are found in the nucleus of an atom.

• They are the electrons in the innermost shell.

• They are responsible for an atom's chemical properties.

• They are always paired.

Multiple Choice

Which of the following best describes the purpose of an electron-dot structure?

• To show the atomic number of an element

• To represent the arrangement of all electrons in an atom

• To visually display only the valence electrons of an atom

• To illustrate the physical properties of elements

Multiple Choice

Based on the table of electron-dot structures, which elements have exactly two valence electrons?

• Lithium and Beryllium

• Beryllium and Carbon

• Beryllium and Oxygen

• Beryllium and Neon

Multiple Select

Which of the following statements about cations is/are correct?

• A cation is a positively charged ion

• Cations are formed when atoms lose electrons

• Cations are always negatively charged

• Cations are formed by gaining electrons

Multiple Choice

What is the main difference between the electron configurations of a neutral sodium atom and a sodium ion?

• A sodium ion has one less electron than a neutral sodium atom.

• A sodium ion has one more proton than a neutral sodium atom.

• A sodium ion has the same number of electrons as a neutral sodium atom.

• A sodium ion has two more electrons than a neutral sodium atom.