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V125BC [204]
4 years ago
12

Why do elements within a period of the periodic table have different properties

Chemistry
1 answer:
Vera_Pavlovna [14]4 years ago
6 0
This is because in a group, the properties are alike. Remember one thing and you will pass your exams.....that the properties of an element are determined by its electrons, aka valence electrons, and the valence electrons of a group are the same.
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You place a mass of 250 grams on the measurement tray of a triple beam balance and then set the rider on the 500 gram beam to th
Gala2k [10]

Answer:

  • <u>The pointer will not be lined up with the zero mark; it will be above the zero mark.</u>

Explanation:

Althoug the list of statements is not provided, you can assure that the pointer will not be lined up with the zero mark, but above the zero mark.

A <em>triple beam balance</em> is very precise instrument, of common use in most labs, used to measure masses. It has three beams. Each beam works for different precisions and mass increments. One beam measures 1 g increments, other beam measures 10 g increments, and the other one 100 g increments.

If you place a mass of 250 grams on the measurement tray, then the weight will be balanced in the beams with 200 grams in the beam that reads increments of 100 g and 50 grams in the beam that reads increments of 10 g. When this is the situation, the weight is completely balanced, and the pointer will be lined up with the zero mark. But this is not the case.

When the rider on the 500 gram beam is set to the 200 gram mark, and the other riders are set to 0 grams, the weight of the mass (250 g) on the tray is greater than the force exerted by the rider on the beam (200 g) and so the tray will be below the level of balance, and the beam will be above the level of balance. The level of balance is indicated when the pointer is lined up with the zero mark.

7 0
3 years ago
Which image represents the step in mitosis when chromosomes condense and spindle fibers form?
Tatiana [17]
Omg im learning this too . i think it’s the third picture ? bc that’s prophase
3 0
3 years ago
Acetone is a common solvent that has a density of 0.7899 g/mL. What volume of acetone, in milliliters, has a mass of 35.6 g?
lys-0071 [83]

Answer:

45.069 mL

Explanation:

mass/density=volume.

If we fill in the numbers provided, we would have:

35.6/0.7899=45.069

Don't forget to add your measurements!

45.069 mL

3 0
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What is a light-year?
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4 0
3 years ago
Read 2 more answers
How does the equilibrium change to counter the removal of A in this reaction?
sattari [20]

Answer : The correct option for blank 1 is, Shifts left.

The correct option for blank 2 is, Reverse.

Explanation :

According to the Le Chatelier's Principle, when the addition of the reactant in reaction system then the equilibrium will shift to the right (forward) direction of the reaction.

Or, if we remove the reactants from the reaction system then the equilibrium will be shifted to the left (backward) direction of the reaction. And simultaneously, there will be increase in the reverse reaction for the attainment of the equilibrium.


5 0
4 years ago
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