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Physics
OpenStudy (anonymous):

One isotope of oxygen has 8 protons and 10 neutrons. Which is the correct reference for this isotope? A. oxygen-18 B. oxygen-2 C. oxygen-8 D. oxygen-10

OpenStudy (anonymous):

@DarkBlueChocobo

OpenStudy (darkbluechocobo):

a

OpenStudy (anonymous):

thanks i have a few more could u help?

OpenStudy (anonymous):

Which statement explains how the periodic table is arranged? A. The periodic table is arranged by number of neutrons found within the most common isotopes. B. The periodic table is arranged by the outermost electrons of the elements. C. The periodic table is arranged by decreasing atomic mass. D. The periodic table is arranged by the radioactivity levels in unstable nuclei of elements.

OpenStudy (darkbluechocobo):

a :p

OpenStudy (anonymous):

How did early chemists determine which substances were elements? A. by observing chemical reactions B. by finding the atomic mass C. by counting neutrons D. by counting protons

OpenStudy (darkbluechocobo):

a

OpenStudy (anonymous):

Where are nonmetals located in the periodic table? The left-hand side of the table begins with Group 1 element. Group 1 elements begin with hydrogen. Group 2 elements begin with Beryllium. Group 3 through Group 12 are in the center of the table. The top row of these element groups include the elements Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Cooper, and Zinc. On the right side of the periodic table are found Groups 13 through 18. Group 13 begins with Boron. Group 14 beings with Carbon. Group 15 begins with Nitrogen. Group 16 beings with Oxygen. Group 17 begins with Fluorine. Group 18 begins with Helium. along the upper left side A. in the middle B. along the bottom C. along the upper right side D.

OpenStudy (anonymous):

along the upper left side A. in the middle B. along the bottom C. along the upper right side D.

OpenStudy (anonymous):

the answer is on top of the letter

OpenStudy (anonymous):

... hello

OpenStudy (anonymous):

@DarkBlueChocobo

OpenStudy (darkbluechocobo):

i believe c

OpenStudy (anonymous):

Why do elements in a group on the periodic table have similar chemical properties? A. same number of outermost electrons B. same number of protons C. similar atomic numbers D. similar atomic masses

OpenStudy (darkbluechocobo):

a

OpenStudy (anonymous):

Which term refers to substances that cannot be broken down physically or chemically? A. atoms B. molecules C. mixtures D. alloy

OpenStudy (anonymous):

a?

OpenStudy (darkbluechocobo):

d

OpenStudy (anonymous):

ok just a couple more

OpenStudy (darkbluechocobo):

hokay

OpenStudy (anonymous):

Which property of gasoline is a physical property? A. odor B. flammability C. combustibility D. decomposition

OpenStudy (anonymous):

odor?

OpenStudy (darkbluechocobo):

b

OpenStudy (anonymous):

Which is a chemical property of copper? A. ability to oxidize B. color C. odor D. freezing point

OpenStudy (anonymous):

d?

OpenStudy (anonymous):

idk lol

OpenStudy (darkbluechocobo):

a. Freezing point is a physical property

OpenStudy (anonymous):

o ok

OpenStudy (anonymous):

Why is it possible for a liquid to take the shape of its container? A. Molecules of a liquid don’t move at all. B. Molecules in any liquid are very far apart. C. All the particles in a liquid are round and smooth. D. Molecules of a liquid easily slide around each other.

OpenStudy (anonymous):

a. molecules of liquid don't move at all

OpenStudy (anonymous):

idk why it showed up as question marks

OpenStudy (darkbluechocobo):

just have to refresh teh page

OpenStudy (anonymous):

o ok

OpenStudy (anonymous):

so what is it

OpenStudy (darkbluechocobo):

d looks like the best answer

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

3 more!

OpenStudy (anonymous):

Which type of change occurs when the electrons between two atoms form a bond? A. nuclear change B. neutron change C. color change D. chemical change

OpenStudy (darkbluechocobo):

d

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

Which best describes the difference between a physical change and a chemical change? A. A chemical change does not result in a new substance being formed, whereas a physical change does. B. A physical change is a change from one state of matter to another; a chemical change results in a new substance formed. C. A physical change produces a new element, and a chemical change results in a bond breaking between atoms. D. A chemical change results in a new element being formed, and a physical change results in a new compound being formed.

OpenStudy (anonymous):

b?

OpenStudy (darkbluechocobo):

b you are correct

OpenStudy (anonymous):

yay last one!

OpenStudy (anonymous):

Which physical properties can be used to identify an unknown material? Choose all answers that are correct. A. solubility B. melting point C. temperature D. mass

OpenStudy (anonymous):

it can be more than one

OpenStudy (anonymous):

a,b?

OpenStudy (darkbluechocobo):

a and d :p

OpenStudy (anonymous):

ok

OpenStudy (anonymous):

thx!

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