EXPLANATION :
mass is the quantity of matter in an object .
volume is the amount of space that something contains or fills .
density is the thickness of a solid , liquid or gas measured by its mass per unit of volume.
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Answer:
Decreases.
Explanation:
The speed of the gas particles in the sealed flask in question here will decrease as it enters the freezer because the motion of the gas particles will slow down.
Based on the kinetic molecular theory of gases, the temperature of the gas is a measure of the average kinetic energy of the molecules.
Since the freezer makes substances cool and temperature drops, the kinetic energy of the gases will substantially drop. Kinetic energy is the energy due to the motion of a body.
Answer: B
Explanation: Have to be careful here.Clearly, the samples could have different mass, and COULD have different volume and they could be either solid, liquid or gas.
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You just look at what vertical row that silicon is, and every element that is in the same vertical row as silicon will have the same lewis dot structure...and this applyes for most elements on the periodic table of elements.
- C, Ge,Sn, Pb:
all these elements are in the same column, and therefore have the same number of valence electrons
Answer:
Kr
Explanation:
The noble gas that is isoelectronic with Br⁻ is krypton.
This is because krypton is the closest noble gas to Br on the periodic table.
Electronic configuration of Bromine is;
2, 8, 18, 7
Br⁻ becomes; 2, 8, 18, 8
Krypton is; 2, 8, 18, 8