11 Questions
What is the charge of an electron?
Negative
What is the charge of a proton?
Positive
What is the atomic number of an element defined as?
The number of protons in the nucleus
What is the relationship between the atomic number and the number of electrons in an electrically neutral atom?
They are equal
What defines the atomic mass of an atom?
Sum of protons and neutrons
What term is used to describe atoms of the same element with different atomic masses?
Isotopes
In the established scale, how is 1 atomic mass unit (amu) defined?
As the atomic mass of carbon-12
What relationship does A ≅ Z + N represent?
The sum of protons and neutrons in an atom
How many atoms or molecules are present in one mole of substance?
6.022 × 10²³
Which equation relates atomic weight in amu per atom to grams per mole?
1 amu/atom = 1 g/mol
When is it convenient to use amu per atom or molecule for atomic weight?
When dealing with large numbers of atoms or molecules
Learn about the composition of atoms, including the nucleus made of protons and neutrons, and the orbiting electrons. Understand the electrical charges and masses of protons, neutrons, and electrons.
Make Your Own Quizzes and Flashcards
Convert your notes into interactive study material.
Get started for free
