Unit 2: Building Biomolecules Flashcards
1
Q
What are the 4 atoms that make up living organisms?
A
Carbon, Hydrogen, Oxygen, Nitrogen
2
Q
How are the 4 most common atoms organized?
A
Present in simple forms/molecules (CO2, H2O), or complex “macromolecules”
3
Q
Parts of an atom:
A
- Nucleus, core that contains protons and neutrons
- Electrons, orbit the nucleus
4
Q
What is the atomic number?
A
The number of protons
5
Q
How to find the mass number of an atom?
A
of protons + # of neutrons
6
Q
An atom’s charge is automatically…
A
Neutral because # of protons = # of electrons
7
Q
An isotope is…
A
An atom with a different number of neutrons
8
Q
How do electrons travel around the nucleus?
A
In orbitals that are grouped into shells, depending on how far the electrons in that shell travel from the nucleus
9
Q
A
