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Scilla [17]
3 years ago
8

When a physical change in a sample occurs, which of the following does NOT change?

Chemistry
2 answers:
Vanyuwa [196]3 years ago
8 0
I think thee correct answer from the choices listed above is option D. <span>When a physical change in a sample occurs, composition of the sample does not change. It stays the same. Also, the properties of the sample will still be the same. Hope this answers the question.</span>
Lunna [17]3 years ago
5 0
D. Composition does not change during a physical change.
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What does vinegar do to eggs
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A link to this experiment is below in the comment box


7 0
3 years ago
What will be the charge of an atom containing eight protons, nine neutrons, and 10 electrons?
Wittaler [7]
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6 0
3 years ago
What is the percentage error of a length measure of 0.229 cm if the correct value is 0.225 cm
olchik [2.2K]
((|Vtrue-Vobserved|) / (Vtrue)) x 100

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8 0
3 years ago
Which metal in Period 5 is very reactive and has two valence electrons in each atom? rubidium (Rb) strontium (Sr) zirconium (Zr)
vladimir1956 [14]
<h3>Answer:</h3>

           Strontium (Sr)

<h3>Explanation:</h3>

                        The condition given in statement is the presence of two valence electron. Hence, first we found the electronic configuration of given atoms as follow;

                       Rubidium                         [Kr] 5s¹

                      Strontium                        [Kr] 5s²

                       Zirconium                         [Kr] 4d² 5s²

                      Silver                                 [Kr] 4d¹⁰ 5s¹

From above configurations it is cleared that only Strontium and Zirconium has two electrons in its valence shell.

We also know that s-block elements are more reactive than transition elements due to less shielding effect in transition elements hence, making it difficult for transition metals to loose electrons as compared to s-block elements. Therefore, we can conclude that Strontium present in s-block with two valence electrons is the correct answer.

4 0
3 years ago
Read 2 more answers
why was it important to heat your hydrate gently for 5 minutes before heating it strongly for 10 minutes
snow_lady [41]
If the hydrate gets too hot it could start splattering and cause a loss of sample.
6 0
2 years ago
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