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GenaCL600 [577]
3 years ago
7

In this lesson, you learned about the properties that distinguish one element from another.

Chemistry
1 answer:
Dovator [93]3 years ago
7 0
Element: is a pure substance with one type of atom, and what makes an element unique is its atomic/proton number

isotopes: is two or more species of atoms of a chemical element with the same atomic/proton number.(meaning in I should job has the same element but different neutrons)

ions: is a atom that has lost or gained electrons

Hopefully i could help(this was all from my notes so it’s a bit more simplified!!
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A student measures the mass of a 6.0 cm3 block of brown sugar to be 10.0 g. What is the density of the brown sugar?
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Answer:

1.67g/cm3

Explanation:

The formula for density is d=\frac{m}{v} . The m variable stands for mass and the v variable stands for volume.

The mass of the brown sugar is 10.0g and the volume is 6.0cm3, so we can plug those values into the equation.

d=\frac{10g}{6cm^{3} }

d=1.67\frac{g}{cm^{3} }

Rounded to 3 significant figures, the density of the block of brown sugar is 1.67 g/cm3. If the mass is in grams and the volume is in cm3, the unit for the final answer is \frac{g}{cm^{3} } (grams per centimetres cubed).

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Answer: B- 22.2 kg

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