Miguel used a balance to compare the masses of two boxes that are the exact same size and weight when empty. When he placed a box on each side of the balance, it tipped on one side. Which of the following would explain why this happened? Since the boxes have the same size and weight, the boxes need to be placed on the scale at the same time to balance it.
The boxes have different masses because they have different objects inside them, meaning one has more matter.
The cardboard is thinner on one of the boxes, making its mass greater than the mass of the other box.
The scale must be broken since the boxes have the same size and weight, the mass of the boxes should be the same.

alkaline metals are lithium, sodium, rubidium, potassium, cesium and francium.

alkali metals have electronegativity from 0.7 to 1, lowest in periodic table of elements, which means that alkali metals (i group in periodic table) has positive oxidation number in compounds.

electronegativity is a chemical property that describes the tendency of an atom to attract a shared pair of electrons towards itself.

alkaline metals (far left in main group) have lowest ionizations energy and easy remove valence electrons,

for example, potassium is the alkali metal and has a single valence electron in the outer electron shell.

electron configuration of potassium is: ₁₉k 1s²2s²2p⁶3s²3p⁶4s¹.

they can not exist alone in nature, because they are very reactive.

personal, she chose to do it.

for step 7 table c on the lab "newtons law of action"   the average time it took the car to travel .25 meters   was 1.92 seconds.

the average time it took the car to travel 0.50 meters was 2.61 seconds

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the answer is yes

it has kinetic energy

reason

an object has kinetic energy when you stop the force carrying it, the object will stay in motion.

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