Periodic Table
The actinide series is a part of this area of the periodic table.
What is the inner transition metals?
What is the atomic number of phosphorus?
15
An object has a density of 5g/cm3 and a mass of 75g. What is its volume?
15cm3
These two subatomic particles are about the same size.
protons and neutrons
A substance has a boiling point of 35oC.
Is boiling point a physical or chemical property?
physical property
These are the most reactive metals.
Group 1 (alkali metals)
Which element has the average atomic mass of 79.9 amu?
bromine
If there are 100cm in 1 m, how many meters is 889 cm?
8.89 m
These subatomic particles cause chemical reactions.
electrons
Cereal and milk would be categorized as what type of mixture?
heterogeneous
These elements have characteristics of both metals and nonmetals.
What are metalloids?
An atom of manganese has a mass number of 52. How many neutrons does it have?
27
A graduated cylinder contains 50 mL of water. When 10 g of a metal is added to the cylinder, the volume rises to 52.5 mL. What is the density of the metal?
4 g/cm3
This area takes up a very small part of the atom, but contains most of the mass of the atom
nucleus
Iron moves when it is near a magnet. What type of property is this?
physical
These nonmetals are the least reactive.
What are the noble gases?
An atom has 43 electrons. How many protons are there?
43
Sandy determines the boiling point of water to be 95oC. The chemistry textbook says that water's boiling point is 100oC. What is Sandy's percent error?
5 %
An atom is neutral because.............
the number of protons equals the number of electrons
Is sugar an element or compound?
compound
The periodic table is now organized by:
What is atomic number?
Carbon has two isotopes, carbon-12 and carbon-13. Which isotope is more abundant and why?
Carbon-12 because the average atomic mass is closest to 12.
A 600g box has dimensions of 20 cm x 12 cm x 3 cm. What is its density?
0.83 g/cm3
This is the smallest part of an element that has the properties of the element.
atom
__________________says that the mass of the reactants must equal the mass of the products
law of conservation of mass