structure of the atom Flashcards
(17 cards)
What is the smallest unit of an element?
Atom
True or False: Atoms are made up of protons, neutrons, and electrons.
True
What is the charge of a proton?
Positive
Fill in the blank: The nucleus of an atom is composed of ______ and ______.
protons, neutrons
What is the charge of an electron?
Negative
Which particle has no charge?
Neutron
What determines the atomic number of an element?
The number of protons in its nucleus
True or False: Electrons are found in the nucleus of an atom.
False
What is the term for the region around the nucleus where electrons are likely to be found?
Electron cloud
Multiple choice: Which particle has the greatest mass? A) Proton B) Neutron C) Electron
B) Neutron
What is an isotope?
Atoms of the same element with different numbers of neutrons
What is the mass number of an atom?
The total number of protons and neutrons in its nucleus
True or False: The number of electrons in a neutral atom equals the number of protons.
True
Fill in the blank: The ______ model describes the atom as having a dense nucleus surrounded by electrons in specific energy levels.
Bohr
What is the role of electrons in chemical bonding?
They are involved in the formation of bonds between atoms.
atomic number
number on the bottom number of protons
atomic mass
top number, protons + neutrons
