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Neporo4naja [7]
4 years ago
8

When performing labratory experiments, which of the following items is ALWAYS necessary to use?

Chemistry
1 answer:
densk [106]4 years ago
3 0
All of the the answers are are correct but a fume hood is more for if you are dealing with chemicals that can produce fumes the are deadly to people
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A lithium atom contains 3 protons,4neutrons and 3 electrons.What would be formed if a proton was added to this atom.
slega [8]

Answer:

Adding one proton to an atom of lithium with 3 protons, 4 neutrons and 3 electrons would form a _beryllium ion_. The new atom have 4 protons and 4 neutrons since Be has a mass number of 9 then it has to form an ion. Hope this helps! PLEASE GIVE ME BRAINLIEST!!!! =)

8 0
3 years ago
Once you have completed your research, write a summary about what characterizes science and its methods. Identify a question tha
Yuki888 [10]

Answer:

- Scientific question: does life exist on other planets?

- Non-scientific question: there are aliens that look like people?  

Explanation:

A scientific question is a coherent question that can be used to develop a scientific hypothesis. Thus, a scientific question must be testable, verifiable, measurable and relevant to the topic of study. In the scientific method, the hypothesis is subsequently tested by experimental or observational procedures, where the results can be used to understand some particular aspect of the real world. On the other hand, a non-scientific question is a light conjecture which cannot be proved by using the scientific method.

8 0
4 years ago
How do the hydrosphere and atmosphere interact? give an example
vladimir1956 [14]

Answer:

Evaporation

Explanation:

Water in the ocean, rivers, lakes, etc. is part of the hydrosphere, and when that water evaporates it enters the atmosphere

3 0
3 years ago
Who was the scientist that coined the term cell?
Doss [256]
Robert Hooke was the scientist that coined the term cell
5 0
3 years ago
Identify the correct statement. A. It is not possible for two atoms to share more than two electrons. B. A covalent bond has a l
RSB [31]

Answer:

B. A covalent bond has a lower potential energy than the two separate atoms.

Explanation:

<em>Identify the correct statement. </em>

<em>A. It is not possible for two atoms to share more than two electrons.</em> FALSE. Atoms also can share 4 electrons (double bond) or 6 electrons (triple bond).

<em>B. A covalent bond has a lower potential energy than the two separate atoms.</em> TRUE.

<em>C. Single bonds are shorter than double bonds.</em> FALSE. Single bonds are longer than double bonds.

<em>D. A covalent bond is formed through the transfer of electrons from one atom to another.</em> FALSE. In covalent bonds, electrons are shared, not transferred from one atom to another.

<em>E. A pair of electrons involved in a covalent bond are sometimes referred to as lone pairs.</em> FALSE. Lone pairs are those that do not participate in a bond.

5 0
3 years ago
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