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Serga [27]
3 years ago
11

Use the periodic table to determine which of the

Chemistry
1 answer:
ad-work [718]3 years ago
8 0
A=79, N=44 lmk if I’m wrong ?
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Which best describes the effect of J. J. Thomson’s discovery?
worty [1.4K]

Answer:

A. The accepted model of the atom was changed.

Explanation:

Thomson described an atom that has the protons uniformly distributed within a circular atom with the electrons embedded . However, it cannot explain the emission of electrons from the surfaces of metals like photoelectric emission. it does not explain how the particle of the atom contribute significantly to the entire mass of an atom

7 0
3 years ago
elect the correct answer. The elements beryllium, calcium, and strontium are all in group 2. What is the correct relationship of
deff fn [24]

Answer:

D. Sr < Ca < Be  

Step-by-step explanation:

<em>Ionization energ</em>y decreases from top to bottom within a Group, because the valence electrons are further from the nucleus and therefore easier to remove.

Thus, <em>Sr has the lowest</em> ionization energy and <em>Be the highes</em>t.

The correct order is Sr < Ca < Be.

3 0
3 years ago
A solution with a pH of 11 has a [H+] of...
hram777 [196]

Answer:

c. 1×10^-11

Explanation:

ph= -log[H+]

[H+]= 10^-ph

=10^-11

= 1×10^-11

8 0
3 years ago
A cell using protein-mediated facilitated diffusion is treated with a toxin that prevents conformation change in the membrane pr
seraphim [82]

Answer:

The most likely outcome is that carrier protein dysfunction will increase the gradient which will lead to disruption of cellular metabolism.

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3 years ago
What does this motion cause on the surface of the earth (rotation)
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The motion causes day and night because the earth is constantly spinning on it's axis.
3 0
3 years ago
Read 2 more answers
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