Water can dissolve many substances because it has an overall negative charge, allowing it to attack positively-charged ions.

1 answer:

5 0

True
<span>1: Cation-positive charge 2: Isotope-diff # of neutrons 3: Element-it can be found on the periodic table(pure) 4: Anion-negative charge 5: Compound-even ration 6: Ion-element with a charge(cations and anions are a more specific way of describing ions) Hope this helps!</span>

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Vector vector a has a magnitude of 29 units and points in the positive y-direction. when vector vector b is added to vector a ,

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Good morning.

We have:

$\mathsf{\overset{\to}{a} = 29\overset{\to}{j}}$

Where j is the unitary vector in the direction of the y-axis.

We have that

$\mathsf{\overset{\to}{a}+\overset{\to}{b} = -18\overset{\to}{j}}$

We add the vector -a to both sides:

$\mathsf{\overset{\to}{b} = -18\overset{\to}{j} -\overset{\to}{a} = -18\overset{\to}{j} -29\overset{\to}{j}}\\ \\ \mathsf{\overset{\to}{b}=-47\overset{\to}{j}}$

Therefore, the magnitude of b is 47 units.

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Also, across the period from left to right, they also show a repeating pattern.

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