November Science
How many valence electrons are found in Helium?
2
An element is found in group 15, period 2. How many energy levels will be drawn on a Bohr model of this element?
2 energy levels.
How many energy levels will be drawn on a atom of Magnesium?
3
How many protons, neutrons, and electrons will an atom of silver have?
47 protons 47 electrons and 61 neutrons
How many valence electrons does an atom of Arsenic have?
5
How many electrons are found in one atom of Cesium?
55
How many neutrons are found in one atom of Boron?
6
Classify concrete as a pure substance or mixture. Defend your answer.
A mixture because it isn't chemically combined and isn't on the Periodic Table.
Name the group where Calcium can be found on the periodic table.
Alkaline Earth Metals
Which element does not belong and why? Nickel, Aluminum, Platinum, Titanium
Aluminium because it isn't a transition metal.
What is the difference in an element and a compound?
An element is one atom and a compound is two or more different atoms
The current periodic table is arranged by increasing ________ _________ .
Atomic Number
Which substance is not a mixture: bronze, calcium, milk, stainless steel?
Calcium
Classify carbon dioxide as a pure substance or mixture. Defend your answer.
Carbon Dioxide is a pure substance compound because it's made up of two or more different atoms, and there is a Carbon molecule and and Oxygen molecule and they are both found on the periodic table and they're chemically combined.
Hydrogen is a very flammable gas. Flammability is an example of which property of matter?
Chemical Property
Carbon, oxygen, and nitrogen are all examples of ___________.
Elements
What state of matter is water vapor?
Gas
Iron is a transition metal. Name one physical property of iron.
Good contuctor, malleable, shiny, lusterous, ductile
Which group contains the alkaline earth metals?
Group 2
What is the "family name" for group 17?
Halogens
Which element has only 2 valence electrons but is located in group 18?
Helium
Classify salt water as an element, compound, homogeneous mixture or heterogeneous mixture. Defend your answer.
Homogeneous mixture because none of the objects in the mix are present.
Name the most abundant element in the universe.
Hydrogen
Which element does not belong and why? Lithium, Carbon, Krypton, Neon
Lithium because it is a metal and not a nonmetal.
Which of the following metals will sink if placed in water and why? Lithium: 0.534 g/cc Sodium: 0.971 g/cc Magnesium: 1.738 g/cc {cc is cubic centimeter}
Magnesium because it has a higher density than water.
Which transition metal is liquid at room temperature?
Mercury
Which group on the periodic table consists of elements with metallic and nonmetallic properties?
Metalloids
2. Most of the elements on the periodic table are: metals, nonmetals, or metalloids.
Metals
Gold and Silver are highly malleable metals. Malleability is an example of which property of matter?
Physical Property
Rust consists of molecules of iron oxide (Fe₃O₃). Classify rust as an element, compound, homogeneous mixture or heterogeneous mixture. Defend your answer.
Rust is a Pure Substance Compound because it involves with atoms and there are two different types of atoms.
Name the element that is found in group 8 period 5?
Ruthenium
Which element is found at group 7 period 4?
Ruthenium
Name the element symbol for Tin?
Sn
How do we determine the number of protons in an atom of Copper?
The Atomic Number
The electron dot diagram illustrates the number of __________ ____________ of an atom.
Valence electrons
Classify water as an element, compound, homogeneous mixture or heterogeneous mixture. Defend your answer
Water is a compound because it made up of two or more different atoms(same thing as #29)
Bismuth subsalicylate, Pepto Bismol, consists of 7 carbon, 5 hydrogen, one bismuth, and 4 oxygen atoms. Is Bismuth subsalicylate considered a molecule and/or compound? Why?
it is considered both because there are different atoms and there are two or more atoms.
A solid can turn into a gas if enough _______ _______ is added.
thermal energy