Atomic Structure and the Periodic Table Flashcards
What is the smallest unit of an element?
Atom
True or False: An atom consists of protons, neutrons, and electrons.
True
Fill in the blank: The center of an atom is called the ______.
nucleus
What charge do protons carry?
Positive charge
What is the charge of neutrons?
Neutral
What is the charge of electrons?
Negative charge
Which subatomic particle determines the identity of an element?
Proton
What is the atomic number of an element?
The number of protons in the nucleus
What is the mass number of an atom?
The sum of protons and neutrons in the nucleus
True or False: Electrons are located in the nucleus.
False
What is the maximum number of electrons that can occupy the first energy level?
2 electrons
What is the periodic table?
A tabular arrangement of elements based on their atomic number and properties
Elements in the same column of the periodic table are known as ______.
Groups or families
Which element is represented by the symbol ‘O’?
Oxygen
What are the horizontal rows in the periodic table called?
Periods
True or False: Metals are found on the right side of the periodic table.
False
What is the main characteristic of noble gases?
They are inert and do not readily combine with other elements.
What are isotopes?
Atoms of the same element with different numbers of neutrons.
What type of bond involves the sharing of electron pairs between atoms?
Covalent bond
Which group of elements is known as alkali metals?
Group 1 elements
what element is this C
Carbon
Fill in the blank: The ______ is the region around the nucleus where electrons are likely to be found.
electron cloud
What distinguishes a chemical element from a compound?
An element consists of one type of atom, while a compound consists of two or more different types of atoms chemically bonded.
True or False: The number of electrons in a neutral atom equals the number of protons.
True
What are transition metals known for?
They are known for their ability to form variable oxidation states and complex ions.
What is a valence electron?
An electron in the outermost shell of an atom that can participate in chemical bonding.
Which element has the atomic number 1?
Hydrogen
What is the primary factor that determines an element’s position in the periodic table?
Atomic number
