Question

section 4.3 how atoms differ in your textbook, read about atomic number. for each statement below, write true or false. 1. the number of neutrons in an atom is referred to as its atomic number. 2. the periodic table is arranged by increasing atomic number. 3. atomic number is equal to the number of electrons in an atom. 4. the number of protons in an atom identifies it as an atom of a particular element. 5. most atoms have either a positive or a negative charge.

Explanation:

1. Atomic mass is the sum of protons and neutrons, not just neutrons. So it's false.
2. The periodic table is arranged by increasing atomic number. So it's false.
3. In a neutral atom, atomic number equals number of electrons. But statement doesn't specify neutral, so it's false.
4. The number of protons defines the element. So it's true.
5. Most atoms are neutral. So it's false.

Answer:

1. False
2. False
3. False
4. True
5. False