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Yuliya22 [10]
3 years ago
14

PLEASE IN NEED HELP ASAP

Chemistry
1 answer:
Solnce55 [7]3 years ago
3 0
Because nothing appeared he concluded that <span>that living things could NOT just appear or come from nonliving things like water and air</span>
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Hydrogen has three naturally occurring isotopes which figure into the average atomic mass found on the periodic table (1.00974):
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The number following the name of the element is the number of subatomic particles inside the nucleus of the atom. This means that it is the mass number of the isotope. The average atomic mass of the element is the sum of the products of the percentage abundance and mass number of the naturally occurring isotopes. 

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What measurement of a liquid can you make with a graduated cylinder
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ANSWER THIS WORKSHEET ALSO I WILL GIVE BRAINIEST
aev [14]

Answer:

5. An element's mass number tells the number of protons in its nucleus.

Atomic

6. Negatively charged particles in an atom are called electrons.

True

7. The cloud model of the atom describes the location of electrons as specific orbits around the nucleus.

Bohr

8. Atoms with the same number of protons but different numbers of neutrons are called isomers.

Isotopes

9. The sum of the protons and neutrons in an atom is called the atomic number.

Mass

10. An object that helps explain ideas about the natural world is called a model.

True

11. Mendeleev arranged his periodic table in order of increasing atomic number.

Mass

12. The rows in the periodic table are called periods.

True

13. Moving across the periodic table from left to right, one finds, in order, metals, then gases, then nonmetals.

Metalloids

14. Another name for a period is a family.

Group

15. On the periodic table, elements in the same column have similar properties.

True

Explanation:

4 0
2 years ago
Differentiate between compound and mixture.
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Compound can be describe by a chemical formulation, but
mixture can't
for instance, we can say H2O is a compound, but we can not say sugar water is a compound but mixture
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Ludmilka [50]

Answer:

B: Oganism is gonna be the right answer for this one hope I helped

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