Atomic Structure
What three subatomic particles are found inside an atom?
Protons, Neutrons, and Electrons
Define Isotope
Different versions of the same element
What does the atomic number tell you about an element?
# of protons
and technically, the # of electrons
Which group of elements are found near the zig-zag line on the Periodic table?
Metalloids
Which particle determine's the elements identity?
Protons
The center of the atom is called the _________.
Nucleus
What makes isotopes of the same element slightly different from one another?
# of neutrons and mass #
How many protons does Carbon have?
6 protons
Which group of elements takes up almost 70% of the periodic table?
Metals
Which element on the Periodic table has 50 protons?
Tin (Sn)
Where are electrons found inside the atom?
Outside the nucleus; Energy Levels
In the name "Carbon-14," what does that "14" stand for?
The mass # for that isotope
What is the element symbol for Lead?
Pb
What does malleable mean? Which element(s) have this property?
Hammered into thin sheets
Metals (and technically metalloids too)
Rank the 3 main groups of elements from poorest to greatest conductors of heat/electricity
Nonmetals --> Metalloids --> Metals
______ and ______ are found in the center of the atom
Protons and Neutrons
Write the isotope symbol for Magnesium-26
2612 Mg OR Mg2612
How do you solve for neutrons?
Mass - Protons
OR
Mass- Atomic #
List 3 properties of a nonmetal
Not malleable/ductile, brittle, dull (lack luster), low melting points, poor conductors of heat/electricity, Not magnetic, Not reactive with acid
Element A has 17 protons, 17 electrons, and 18 neutrons. Element B has 17 protons, 17 electrons, and 20 neutrons. Are these isotopes or different elements? Explain.
They are isotopes because they have the same # of protons and a different # of neutrons.
Where is most of the mass found inside of the atom?
The Nucleus
How many protons, neutrons, and electrons are found in Sodium-24?
Protons- 11, Neutrons- 13, Electrons- 11
What is the difference between atomic mass and mass number?
Atomic Mass= AVERAGE weight of an element; written as a decimal on the P.Table
Mass Number= EXACT weight of an element; sum of protons and neutrons
Metalloid (show properties of both metal and nonmetal)
What was the name of the scientist who made the first periodic table?
Dmitri Mendeleev