The structure of an atom🌷 Flashcards
What is the smallest unit of matter?
An atom
True or False: Atoms can be seen with the naked eye.
False
What are the three main subatomic particles?
Protons, neutrons, and electrons
Fill in the blank: Protons have a _____ charge.
positive
What is the charge of a neutron?
Neutral (no charge)
Where are electrons located in an atom?
In the electron cloud surrounding the nucleus
What is the nucleus of an atom made of?
Protons and neutrons
True or False: Electrons have a much greater mass than protons.
False
What determines the atomic number of an element?
The number of protons in the nucleus
Fill in the blank: The mass of an electron is _____ compared to a proton.
negligible
What is an ion?
An atom that has gained or lost electrons, resulting in a charge
How do you calculate the number of neutrons in an atom?
Subtract the atomic number from the atomic mass
What is the role of electrons in chemical bonding?
They participate in the formation of bonds between atoms.
True or False: All atoms of the same element have the same number of protons.
True
What is the term for atoms of the same element with different numbers of neutrons?
Isotopes
What is the maximum number of electrons that can occupy the first energy level?
2 electrons
What does the periodic table organize?
Elements based on their atomic number and properties
Fill in the blank: An atom’s stability is influenced by the number of _____ it has.
electrons
What is the charge of an electron?
Negative
True or False: A neutral atom has equal numbers of protons and electrons.
True
What is the outermost shell of an atom called?
Valence shell
What is the significance of valence electrons?
They determine how an atom will bond with other atoms.
What is a molecule?
A group of two or more atoms bonded together.
Fill in the blank: The atomic mass unit (amu) is used to express the mass of _____ and _____ in an atom.
protons and neutrons
What is the symbol for the element carbon?
C
How many protons are in a carbon atom?
6 protons
