Atoms and the Periodic Table Flashcards
It is a pure substance that cannot be broken down into simpler substances by a chemical reaction.
Element
The position of an element in the periodic table tells us much about its ________ __________.
Chemical Properties
The elements in the periodic table are divided into these three groups.
Metals, Nonmetals, Metalloids
These are located on the right side of the periodic table.
Nonmetals
These do not usually have a shiny appearance.
Nonmetal
These are usually poor conductors of heat and electricity.
Nonmetals
These can be solids, liquids, or gases at room temperature.
Nonmetals
These are located on the solid line that starts at boron (B) and angles down towards astatine (At).
Metalloids
These have properties intermediate between metals and nonmetals.
Metalloids
These are located on the left side of the periodic table.
Metals
These usually exist as shiny solids.
Metals
These are good conductors of heat and electricity.
Metals
These are solids at room temperature, except Mercury (Hg), a liquid.
Metals
A pure substance formed by chemically combining two or more elements together.
Compound
A chemical formula consists of _______ _______ and __________.
Element symbols and Subscripts
All matter is composed of the same building blocks called?
Atom
Atoms are composed of 3 _________ particles.
Subatomic
What is the charge of proton?
+1
What is the charge of neutron?
0
What is the charge of electron?
-1
What is the mass (amu) of proton?
1
What is the mass (amu) of neutron?
1
What is the mass (amu) of electron?
Negligible
Where is the location of protons and neutrons?
Nucleus
It is the dense core of the atom.
Nucleus
It is the location of most of the atom’s mass.
Nucleus
It is the location of electrons.
Electron cloud
It comprises most of the atom’s volume.
Electron cloud
Atomic number (Z) is the number of _______.
Protons
Every atom of the same element has the same ______ ______.
Atomic number
Every atom of a given element has the same number of _______.
Protons
Number of protons is equal to the number of _________.
Electrons
Are atoms of the same element that have a different atomic mass.
Isotopes
Isotopes are atoms of the same element that have a different number of ________.
Neutrons
Mass number = number of protons (Z) + number of *?
Neutrons
