Physical Chem- Atomic Structure Flashcards
What is the charge of a proton?
A proton has a positive charge.
What is the relative mass of a neutron?
The relative mass of a neutron is approximately 1.
True or False: Electrons have a positive charge.
False.
Fill in the blank: The nucleus of an atom contains protons and __________.
neutrons.
What is the atomic number of an element?
The atomic number is the number of protons in the nucleus of an atom.
What determines the identity of an element?
The number of protons in its nucleus.
True or False: Isotopes of an element have the same number of protons but different numbers of neutrons.
True.
What is the mass number of an atom?
The mass number is the total number of protons and neutrons in the nucleus.
Which subatomic particle has the smallest mass?
An electron.
What is an ion?
An ion is an atom or molecule that has gained or lost one or more electrons, resulting in a net charge.
Fill in the blank: Atoms with the same number of protons but different mass numbers are called __________.
isotopes.
What is the main component of the atomic nucleus?
Protons and neutrons.
What is the electron configuration of a neutral oxygen atom?
1s² 2s² 2p⁴.
What does the term ‘atomic mass’ refer to?
The weighted average mass of an element’s isotopes.
What is the shape of the s orbital?
The s orbital has a spherical shape.
