Atoms
How many different subatomic particles compose an Atom?
3
Which subatomic particles are the smallest?
Electrons
How many elements are in the periodic table of elements?
118
What is the first element in the periodic table of elements?
Hydrogen
What are the units of measurement for atomic radius?
Picometers (pm)
How many different types of atoms are there?
118
How many different subatomic particles form the Nucleus?
2 (Protons and Neutrons)
How are the elements arranged in the periodic table?
By atomic number (number of protons)
Which elements are used to make computer chips?
Metalloids
True or False. Elements in the same group have the same number of Electron Shells.
False.
What is atomic mass?
The total mass (weight) of an atom.
The sum of the mass of the protons and neutrons.
How many protons does the element Nitrogen have?
7
What are the characteristics of a metal?
Electricity and Heat conduction.
Malleable
Which element that we talked about in class has 79 protons?
Gold (Au)
How do we determine atomic radius?
Put 2 atoms together, measure the distance between the 2 nuclei, divide that distance by 2.
Which subatomic particles determine the behavior of an atom during chemical bonds?
Valance Electrons
What is the maximum number of electrons that can fit in the first electron shell?
2
Which category is composed mostly of gaseous elements?
Non-Metals
How many non-metal elements are there?
17
What is the attraction between the protons and the electrons of an atom called?
Coulombic Attraction
Describe an element.
A substance composed entirely of one type of atoms.
Describe an Isotope.
Atoms of the same element with a different number of neutrons
How many Periods are in the periodic table of elements?
7
What category is the element Silicon (Si) in?
Metalloids.
Which atom is larger, Lithium or Neon?
Lithium