Vocabulary
The chart that arranges elements by atomic number is the _______________.
Periodic table
True or False. Electrons are located in the nucleus of the atom.
False
True or False- The periodic table arranges elements based on the order of the atomic numbers.
True
Which state of matter has a definite shape and volume?
Solid
How many neutrons does an atom of Palladium (Pd)?
106-46 = 60 neutrons.
The ___________ of an element determines the number of protons in an atom.
Atomic Number
What are the 3 sub-atomic particles of an atom?
proton, neutron, and electron
Which sub-atomic particle has a negative (-) charge?
Electrons
Name the 3 states of matter.
Solid, Liquid, Gas
What is Atomic Mass?
Protons + Neutrons in the nucleus
The smallest unit of an element that still has the properties of the element is an _____________.
Atom
Which part of the atom has a neutral charge?
Neutron
Which element is located in group 11 and period 4?
Copper!
REVIEW: Why does oil float on top of water, even though it appears thicker?
Oil floats on water because it has a smaller density than water. The lower the density, it will float on a liquid with a higher density.
How many neutrons does an atom of Argon (Ar) have?
40-18 = 22 neutrons
What does the atomic mass tell us?
What type of element (metal, non-metal, metalloid) is Oxygen?
Non-metal
____________ is a substance that is made up of only one type of atom.
Elements
Tell me the number of protons, neutrons, and electrons that an atom of Chlorine (Cl) has?
Protons: 17, Electrons: 17, Neutrons:18
The center of every atom and which contains the protons and neutrons is called the __________.
Nucleus
Thallium
How many elements are found in Period 5?
18 elements in period 5
An object has a mass of 10 grams and a volume of 5 cm3. Calculate the density of the object.
2 grams/cm3
Which element is bigger: Magnesium or Krypton?
Magnesium has an atomic number of 12 and Krypton has an atomic number of 18. That means that Krypton is bigger than Magnesium.