gg Flashcards
What is the smallest unit of an element?
Atom
True or False: Molecules are made up of two or more atoms bonded together.
True
Fill in the blank: The number of protons in the nucleus of an atom determines its _____ number.
atomic
What is the charge of a neutron?
Neutral
Which subatomic particle has a positive charge?
Proton
What is the term for atoms of the same element with different numbers of neutrons?
Isotopes
True or False: Electrons are found in the nucleus of an atom.
False
What is the chemical formula for water?
H2O
Which particle has the least mass?
Electron
Fill in the blank: A molecule consisting of two hydrogen atoms and one oxygen atom is called _____.
water
What is the process by which atoms bond to form molecules?
Chemical bonding
Which type of bond involves the sharing of electron pairs between atoms?
Covalent bond
What is the charge of an electron?
Negative
Fill in the blank: The _____ is the center of an atom and contains protons and neutrons.
nucleus
What is the term for the outermost electrons in an atom?
Valence electrons
True or False: An ion is an atom that has lost or gained electrons.
True
What kind of bond is formed when electrons are transferred from one atom to another?
Ionic bond
Fill in the blank: The atomic number of an element is equal to the number of _____ it has.
protons
What do you call a molecule with a net electrical charge due to the loss or gain of one or more electrons?
Ion
Which elements are known as noble gases?
Helium, Neon, Argon, Krypton, Xenon, Radon
What is the term for a substance made of only one type of atom?
Element
Fill in the blank: The _____ model describes the behavior of electrons in atoms as wave-like.
quantum
Which element is represented by the symbol ‘O’?
Oxygen
What is the main difference between an atom and a molecule?
An atom is a single unit, while a molecule is a group of two or more atoms bonded together.
