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IRISSAK [1]
3 years ago
8

Claudia performed a flame test in her lab. The result of her flame test is shown here.

Chemistry
2 answers:
Masteriza [31]3 years ago
6 0

Answer:

Where is the results and what is the question or is there a picture

Explanation:

agasfer [191]3 years ago
6 0

Answer:

The flame test is used to identify certain elements. This is because, when heated, each element will give a special flame color. This color refers to the element itself.

Flame test works best on elements of the first group.

Now, scientific questions means that we are asking for cause and effect.

Examining the given choices, we can identify the scientific questions as follows:

1- What element causes this flame color?

2- Will the flame color change if another element is added?

3- Will changing the temperature affect the flame color?

Explanation:

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Explain why the grams of the nutrient molecules in a food do not add up to the total gram weight of the food.
leva [86]

When we talk about the gram weight of any food item, it may or may not include the gram weight of its different nutrient molecules. It may have different reasons to it. One of the reasons can be because the nutrient molecule might contain a large percentage or proportion of water. Also, the nutrient molecules might be insoluble or indigestible fiber so it does not add up to the total gram weight of food.

5 0
3 years ago
Read 2 more answers
Do you notice a pattern in the charge for elements in each group? Explain.
MrRissso [65]

Answer:

Below are some patterns in the charge for elements in each group.

Group 1 elements : 1 valence electron and form ions with charge +1

Group 2 elements : 2 valence electrons and form ions with charge + 2

Group 3 elements : 3 valence electrons and form ions with charge + 3(there are some exceptions as well)

Elements in groups 4 and 5 are unpredictable also the D block elements consist of multiple oxidation states..

Group 6 elements : 6 valence electrons, form ions with charge -2

Group 7 elements: 7 valence electrons, form ions with charge -1  

The octet rule is being followed, the elements form either ionic bond or covalent bond to fulfill it.

eg: when a K atom forms a K+ ion, the ion has the same electron configuration as the noble gas Ar (argon).

When an O atom gains 2 electrons to form the O²⁻ ion, the ion has the same electron configuration as the noble gas Ne (neon).  

Note: Boron (B) is in Group 3 but doesn't form ions.

7 0
3 years ago
The element tin has the following number of electrons per shell: 2, 8, 18, 18, 4. Notice that the number of electrons in the out
bazaltina [42]

The question is incomplete, the complete question is:

The element tin has the following number of electrons per shell: 2.8. 18, 18, 4. Notice that the number of electrons in the outer shell of a tin atom is the same as that for a carbon atom. Therefore, what must be true of tin? Tin is a polar atom and can bind to other polar atoms. Tin has a high molecular weight to give tin-containing molecules greater stabilty. All of the above Tin conform single covalent bonds with other elements, but not double or triple covalent bonds Tincan bind to up to four elements at a time

Answer:

Tin can bind to up to four elements at a time

Explanation:

Certain important points were made in the question about tin and one of them is that tin is an element in the same group as carbon hence it has the same number of valence electrons as carbon.

Carbon is always tetra valent. The tetra valency of carbon is the idea that carbon forms four bonds.

If tin has the same number of valence electrons as carbon, then, tin can bind to up to four elements at a time

3 0
3 years ago
Which temperatures are equal? (Refer to the diagram of the thermometer in the lesson.)
ella [17]

Answer:

d

Explanation:

4 0
3 years ago
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A hypothetical main group element E reacts with chlorine to form an ionic compound with the formula ECl. The element is a member
Ronch [10]
It would be 1A bc then the +1 charge will cancel out chlorine’s -1 charge
7 0
3 years ago
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