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Elena-2011 [213]
2 years ago
7

In your own words, give a summary of the history of the atom. Make sure to use names of models and the scientists associated wit

h each. Make a different paragraph for each model/scientist. (ADV is a minimum of 5 paragraphs) Notice that the Atomic Theory has changed over time as scientists have added knowledge through experimentation and use of advanced instruments. Be sure to include the following: Plum pudding model orbitals electrons gold foil experiment Bohr's model protons nuetrons nucleus
Chemistry
1 answer:
Bumek [7]2 years ago
5 0
I dont know that’s a hard one I’m in 7 th grade so google it bruh lol
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Are alkali metals good or not good to use as utensils when eating?
nekit [7.7K]

Answer:

no

Explanation:

"Alkali metals are among the most reactive of all metals, which makes them suitable for specific and limited uses.

Alkali metals include lithium, sodium, potassium, rubidium, cesium and francium. These metals have large atomic radii and generally lose electrons during reactions. "

- Reference

8 0
3 years ago
The indicator propyl red has a Ka of 3.3 X 10-6 . It is red at low pH and yellow at higher pH. What is the approximate pH range
Alik [6]

Answer:

4.48 - 6.48

Explanation:

A pH indicator works in a better way in a range of pH = pKa ± 1. That means we need to determine the pKa of the indicator propyl red to find the range over which it change its color. That is:

pKa = -log Ka

pKa = -log 3.3x10⁻⁶

pKa = 5.48

That means the range over propyl red will change from yellow to red or vice versa is:

4.48 - 6.48

5 0
2 years ago
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Drupady [299]

Answer:

A. because there both high pitched voice and low pitched ( girls have sweet, shrill ,high pitched good voice ) where as boys have horase ,low pitched medium voice )

7 0
2 years ago
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no root type structures

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