- Protons and neutrons make up the nucleus of an atom, whilst electrons orbit it
- Protons: Relative mass-1.0 charge- 1+
Neutrons: Relative mass-1.0 charge- 0
Electrons: Relative mass-1/2000 charge- 1-
- The number of protons are equal to the number of electrons in an atom
A <---- Mass number
X <---- Element
Z <----- Atomic number
- Mass number- The number of protons and neutrons in the nucleus of an atom
- Atomic number- the number of protons in the nucleus of an atom
Atomic Structure Questions
- What makes up the nucleus of an atom?
- Fill in the missing blanks:
Protons: Rel. Mass-- Charge--
Neutrons: Rel. Mass-- Charge--
Electrons: Rel. Mass-- Charge--
- What is the atomic number of an atom?
- Define the word mass number.
- Isotopes- Are atoms of the same element but with a different number of neutrons in the atoms nucleus
- isotopes of an element have different masses due to there being a different number of neutrons
- Isotopes of the same element react in the same way because reactions involve electrons not neutrons
- What is an isotope?
- Why does an atom of carbon-12 have a different mass to that of carbon-14?
- When experimenting with the two isotopes, we had discovered that both isotopes reacted in the same way, explain why this had happened?
- Ion- An ion is a positively charged or negatively charged atom or group of atoms
- Atoms can lose or gain electrons
- Ions are charged because they have a different number of electrons that protons in the atom
- Define the word Ion
- Why are ions charged?