<span>The formula for mass, which is mass = density x volume, can be rewritten as volume = mass/density. We can deduce the volume of the cube as the mass and density are given: 17.2g/2.7g/ml = 6.37ml. Now that the volume of the cube is known, we can deduce the edge length. Volume = length x width x height, so 6.37 = X^3. We then take the cube root of 6.37 to discover the value of x, which will be the edge length of the cube. The edge length of the cube is 1.85 cm.</span>
We use acids and bases in everyday life for cooking and cleaning
<span>(3) Atomic masses are a weighted average of the naturally occurring isotopes.
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Here, we found this answer my looking at the key words 'naturally occurring isotopes'
An isotope is a different amount of neutrons, making the atomic mass change.
Periods are rows horizontally along the periodic table whereas groups are vertical columns down the periodic table.
Elements in the same group react similarly. E.g. the group 1 metals (found in the first column of the periodic table) react readily with air and water (this is the similarity) but these reactions become more vigorous / explosive as you go down the group (this is why they are similar but not the same). This is because elements in the same group have the same number of electrons in their outermost energy level (and electrons are responsible for how an element reacts)
Elements in the same period of the periodic table have the same number of inner most (also known as 'main') energy levels so have the same amount of electron shielding.
The match up of the left to the right column is;
1. Asteroid - A) varies greatly in size from one to the next
2. Gas Giant - B)atmosphere is primarily made of hydrogen and helium
3. Comet- C) has a characteristic glow
4. Meteoroid - D) usually burns up if it enters the earth's atmosphere
<h3>What is asteroid and meteoroid?</h3>
An asteroid is known to be a kind of a small rocky object that is said to often orbits the Sun.
Note that an meteor is known or regarded as what occurs if ]a small piece of an asteroid or comet, known to be a meteoroid, burns up when they enter Earth's atmosphere.
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