Physics

Physics, 17.11.2019 03:31, anthonybowie99

Which element comes first in a chemical formula?
question 10 options:

those with positive oxidation numbers.

those with negative oxidation numbers.

the first element is always a metal.

the first element is always a nonmetal.

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Answers: 1

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Physics, 05.10.2019 01:30, juana18

match the particles of an atom. question 1 options: proton neutron electron 1. the particle of an atom that is found in the nucleus that has a positive. 2. the particle of an atom that is found in the nucleus that has no charge. 3. the particle of an atom that is found outside of the nucleus that has a negative charge. question 2 (1 point) the number tells the number of protons and electrons in an atom. question 2 options: atomic molecular mass question 3 (1 point) nitrogen has an atomic number of 7 and a mass number of 14. which statement is true? question 3 options: there are 7 protons, 14 neutrons and 7 electrons in this atom. there are 7 protons, 7 neutrons and 7 electrons in the nitrogen atom. there are 14 electrons in the atom of nitrogen. question 4 (1 point) jill tells bobby that the lightest element in the periodic table is chlorine because it has an atomic number of 17. bobby states that jill is incorrect and that he believes that hydrogen is the lightest element because it has an atomic number of 1. which statement is correct? question 4 options: jill is correct because chlorine has more protons. bobby is correct because chlorine has more protons. chemical or physical properties select either chemical or physical for each property of matter question 5 (1 point) flammability question 5 options: chemical physical question 6 (1 point) oxidation question 6 options: chemical physical question 7 (1 point) shape question 7 options: chemical physical question 8 (1 point) density question 8 options: chemical physical question 9 (1 point) reactivity question 9 options: chemical physical question 10 (1 point) mass question 10 options: chemical physical question 11 (1 point) color question 11 options: chemical physical chemical and physical changes select chemical, physical or both to describe each change question 12 (1 point) molding clay question 12 options: chemical physical question 13 (1 point) burning a candle question 13 options: chemical physical question 14 (1 point) burning a log question 14 options: chemical physical question 15 (1 point) drying your hair question 15 options: chemical physical question 16 (1 point) cutting a steak question 16 options: chemical physical question 17 (1 point) painting a wall question 17 options: chemical physical question 18 (1 point) baking soda and vinegar produces a gas that causes a balloon to inflate question 18 options: chemical physical question 19 (1 point) a fence rusting question 19 options: chemical physical question 20 (1 point) the statue of liberty turning green over time question 20 options: chemical physical states of matter question 21 (1 point) match each state of matter with its description of particle arrangement and movement. question 21 options: particles are loosely connected and glide and slide over each other. particles are spread out and move quickly and collide into each other particles are packed close together and vibrate in place 1. solid 2. liquid 3. gas or plasma question 22 (1 point) a liquid has definite shape and indefinite volume. (definite means that it never changes and indefinite means that it changes) question 22 options: true false question 23 (1 point) a gas has indefinite shape and indefinite volume. (definite means that it never changes and indefinite means that it changes) question 23 options: true false question 24 (1 point) a solid has definite shape and indefinite volume. (definite means that it never changes and indefinite means that it changes) question 24 options: true false

Answers: 1

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Chemistry, 12.10.2019 23:50, tjgamer12

Question 5 in their compounds, metals: are assigned positive oxidation numbers are assigned negative oxidation numbers are assigned oxidation numbers of zero can be assigned any oxidation number that balances the equation question 6 in the reaction, zn (s) + fe+2 (aq) imported asset zn+2 (aq) + fe (s), the oxidizing agent is: the zn the fe the zn+2 the fe+2

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Chemistry, 24.10.2019 02:00, heyItsLuna234

Question 1 (1 point) "co" is question 1 options: chemical formula name symbol question 2 (1 point) "manganese sulfate" is question 2 options: name symbol chemical formula question 3 (1 point) "copper" is question 3 options: chemical formula symbol name question 4 (1 point) "zn" is question 4 options: name symbol chemical formula question 5 (1 point) "copper nitrate" is question 5 options: chemical formula name symbol question 6 (1 point) "nh4vo3" is question 6 options: symbol name chemical formula question 7 (1 point) "fe(no3)3" is question 7 options: chemical formula name symbol question 8 (2 points) dissolving is a sign of which kind of change? question 8 options: chemical physical question 9 (2 points) evaporating is a sign of which kind of change? question 9 options: physical chemical question 10 (2 points) color change is a sign of which kind of change? question 10 options: physical chemical question 11 (2 points) a precipitate forming is a sign of which kind of change? question 11 options: chemical physical the bat line is the key to separating the metals from the non-metals. question 12 (1 point) which element in nh4vo3 is a metal? question 12 options: o n v h question 13 (1 point) which element in mnso4 is a metal? question 13 options: s mn o question 14 (1 point) which element in fe(no3) is a metal? question 14 options: fe n o use the periodic table to figure out what type of metal an element is. question 15 (1 point) what kind of metal is ca? question 15 options: alkali metal transition metal alkaline earth metal question 16 (1 point) what kind of metal is co? question 16 options: alkali metal alkaline earth metal transition metal question 17 (1 point) what kind of metal is cu? question 17 options: transition metal alkali metal alkaline earth metal question 18 (1 point) what kind of metal is zn? question 18 options: transition metal alkaline earth metal alkali metal question 19 (1 point) what kind of metal is k? question 19 options: transition metal alkali metal alkaline earth metal question 20 (1 point) true or false: non-metal is a kind of metal. question 20 options: true false question 21 (1 point) true or false: hydrogen is an alkali metal. question 21 options: true false question 22 (8 points) two of the metallic compounds used in this lab reacted with neither the acid (hcl), nor the base (nh4oh). what were the names of the metals in those two compounds? question 22 options: calcium v cu ca potassium cobalt vanadium k mn zinc copper manganese zn co iron fe

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Chemistry, 08.11.2019 01:31, soleydyperez

Aus de carreu viis4. molecules are neutral.5. a term that means "without water" is anhydrous.6. when an atom gains or loses electrons, the charged particle that results is called a molecule.alled moleccte.7. the formula so42- stands for ammonium.. an atom is chemically unstable when its outer energy level contains all the electrons it can hold.the chlorine atoms in hydrogen chloride have a stronger attraction for the electrons than the hydrogen atomsdo. the hydrogen chloride molecule is therefore a nonpolar covalent molecule.an element's oxidation number indicates how many electrons the element must gain, lose, or share to becomestable.oiceetter of the choice that best completes the statement or answers the question.a chemical formula, the number of each type of atom in the compound is shown by numbers calledsuperscriptsc. oxidation numberschemical symbolsd. subscripts

Answers: 3

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Which element comes first in a chemical formula?
question 10 options:

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