Ill give brainliestt and all points i have

a student makes a drawing of a carbon atom. which of these should the student show in the nucleus of the atom? *
1 point
ions
protons
electrons
molecules
2. which pair below describes isotopes of the same element? *
1 point
a) an atom with 6 protons and 8 neutrons - an atom with 8 protons and 6 neutrons
b) an atom with 6 protons and 6 neutrons - an atom with 6 protons and 7 neutrons
c) an atom with 8 protons and 8 neutrons - an atom with 7 protons and 8 neutrons
d) an atom with 7 protons and 6 neutrons - an atom with 6 protons and 6 neutrons
3. which diagram best represents molecules of matter in the gas phase? *
1 point
a
b
c
d
4. all of the liquid from a test tube is poured into a beaker, as shown in the diagram below. compared to the liquid that was in the test tube, the liquid in the beaker has *
1 point
captionless image
a. a different volume, but the same shape.
b. the same volume, but a different shape.
c. a different volume and a different shape.
d. the same volume and the same shape.
5. color, shape, texture, and size are properties of matter. *
1 point
a) chemical
b) liquid
c) physical
d) solid
6. maggie recorded her observations of the baking soda used in lab today. which observation indicated a chemical property of the baking soda? *
1 point
captionless image
a) odor
b) color
c) texture
d) bubbles
7. the pictures below represent changes observed: *
1 point
captionless image
a) picture i shows a chemical change, because a new substance is formed.
b) picture ii shows a chemical change, because a new substance is formed.
c) picture i shows a chemical change, because the same substance changes form.
d) picture ii shows a chemical change, because the same substance changes form.
8. the diagram below shows a portion of the periodic table of the elements. which element below has chemical properties similar to the chemical properties of fluorine (f)? *
1 point
captionless image
b
o
he
i
9. which element below has chemical properties similar to the chemical properties of tin (sn)? *
1 point
captionless image
as
in
ge
sb
10. which of the following statements best explains why elements in the same family of the periodic table have similar bonding properties? *
1 point
a) the elements have similar atomic sizes.
b) the elements have similar atomic masses.
c) the elements have similar numbers of protons.
d) the elements have the same number of valence electrons.
11. when carbon and oxygen combine chemically, the mass of the product is *
1 point
a. greater than the mass of the carbon plus the mass of the oxygen.
b. equal to the mass of the carbon plus the mass of the oxygen.
c. equal to the mass of the carbon.
d. less than the mass of the carbon
12. after some wood has completely burned in a fire, some of the matter that made up the wood has been destroyed. is the statement correct or incorrect? explain. *
1 point
a) it is correct. the ashes weigh less than the original wood and this proves that some of the mass was destroyed.
b) it is incorrect. ashes look different than wood but the mass of the ashes is the same as the mass of the original wood.
c) it is incorrect. look at the ashes under the microscope. these particles will look exactly like the particles in the wood.
d) it is incorrect. capture and collect all of the gases given off by the fire and combine these masses with the mass of the left over ashes. this should equal the mass of the original wood.
13. a copper sheet is heated in a furnace until it melts. the hot liquid copper is then cooled until it becomes solid again. compare the mass of the copper before and after melting. *
1 point
a) the new solid copper is lighter than the original sheet.
b) the new solid copper is heavier than the original sheet.
c) the new solid copper is the same mass as the original sheet.
d) the molten copper was lighter than the sheet or the new solid.
14. using the law of conservation of matter, determine the number of grams of iron sulfide (fes) that will be produced in this reaction.112g fe + 64g s → g fes *
1 point
a. 48 grams
b. 64 grams
c. 112 grams
d. 176 gram
15. how many different elements are involved in the chemical reaction shown? *
1 point
captionless image
7
5
14
3
16. use the diagram below to fill in each blank. molecules of one type of compound *
1 point
captionless image
a
b
c
d
e
atoms of two different elements *
1 point
captionless image
a
b
c
d
e
molecules of two different compounds *
1 point
captionless image
a
b
c
d
e
mixture of one element and one compound *
1 point
captionless image
a
b
c
d
e
molecules of an element *
1 point
captionless image
a
b
c
d
e
17. which of the following is an example of a container that is filled with a pure substance rather than with a mixture? *
1 point
a) a tire filled with air
b) a jar filled with salt water
c) a balloon filled with helium
d) a glass filled with chocolate milk