Exploring the Fundamentals of Atoms in Life Chemistry

The video tutorial explains the basic structure of atoms, including subatomic particles like protons, neutrons, and electrons. It covers the concepts of atomic number, mass number, and isotopes, and introduces the Bohr model for electron configuration. The tutorial also explains valence electrons and how to represent them using electron dot structures.

What are living things made up of?

• Organs

• Tissues

• Molecules

• Atoms

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-3

Which subatomic particle has a positive charge?

• Neutron

• Photon

• Electron

• Proton

What is the mass of one proton in atomic mass units (AMU)?

• 0 AMU

• 3 AMU

• 1 AMU

• 2 AMU

What does the atomic number of an element represent?

• Number of protons

• Number of atoms

• Number of electrons

• Number of neutrons

How do you calculate the mass number of an atom?

• Add the number of protons and neutrons

• Divide the number of neutrons by protons

• Subtract the number of electrons from protons

• Multiply the number of protons by neutrons

What are isotopes?

• Atoms with the same number of protons but different number of neutrons

• Atoms with the same number of neutrons but different number of protons

• Atoms with the same number of electrons but different number of protons

• Atoms with the same number of protons and neutrons

In the Bohr model, what do the rings around the nucleus represent?

• Neutron orbits

• Proton paths

• Atomic mass

• Energy levels

How many electrons can the first energy level hold in the Bohr model?

• 2

• 4

• 1

• 8

What are valence electrons?

• Electrons in the innermost energy level

• Electrons shared between atoms

• Electrons in the outermost energy level

• Electrons in the nucleus

How many valence electrons does chlorine have?

• 8

• 7

• 6

• 5