November Science

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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


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