Lesson 1: Atomic Structure Flashcards
1
Q
What is the radius of an atom?
A
1 x 10⁻¹⁰m
2
Q
What is the radius of a nucleus in comparison to the radius of an atom?
A
- Radius of nucleus is less than 1/10000th of radius of atom.
3
Q
Where is most of the mass of atom concentrated?
A
- Most of mass concentrated in nucleus.
4
Q
What causes an electron to move to a higher energy level?
A
- Absorption of electromagnetic radiation (electron moves further away from nucleus to higher energy level.)
5
Q
What causes an electron to move to a lower energy level?
A
- Emission of electromagnetic radiation (move closer to nucleus/ lower energy level.)
6
Q
What is the basic structure of an atom?
A
The basic structure of an atom is a positively charged nucleus composed of both protons and neutrons surrounded by negatively charged electrons.
7
Q
What are isotopes?
A
- Isotopes are atoms of the same element with a different number of neutrons.
- Isotopes of the same element have different mass numbers.
8
Q
When can atoms turn into positive ions?
A
Atoms turn into positive ions if they lose one or more outer electron(s).
9
Q
Do 2 isotopes of the same element have the same charge? Explain why?
A
- Yes
- Because same number of protons
