CHEMISTRY MIDDLE SCHOOL

Which of the following is NOT correct about elements?(10 Points)

A. Elements cannot be broken down into simpler substances.

B. Elements are represented by chemical formulas.

C. Elements are pure substances.

D.Elements can combine chemically to form compounds.

Answers

Answer 1

Answer:

Answer:

It is B.

All the other answers are true.

A element can not be simpler

Answer 2

Answer:

Final answer:

The correct answer is B. Elements are represented by chemical formulas.

Explanation:

Out of the given options, the correct answer is B. Elements are represented by chemical formulas.

Chemical formulas are used to represent compounds, not elements. Elements are pure substances that are made up of only one type of atom and cannot be broken down into simpler substances. They are represented by their chemical symbols, such as H for hydrogen and O for oxygen.

For example, water is a compound made up of two elements: hydrogen and oxygen. The chemical formula for water is H2O, where H represents hydrogen and O represents oxygen.

Learn more about Elements here:

brainly.com/question/33240116

#SPJ6

Related Questions

Please help meeeee!!!!!!!There is a big push right now in trying to rely on nonrenewable resources for the majority of our energy needs. Should we even try to power the world with 100% renewable resources? Justify your reasoning
How long would it take for a car to travel 200km if it has an aventage speed of 55 km/ hr
What happens when a mechanical wave travels through medium
Marfan syndrome is a genetic disorder caused by a dominant allele.describe how marfan syndrome is inherited
The body is a system of interacting subsystems composed of a group of specialized cells and tissues because....Can someone help fill in the rest? Thanks

Could a mixture be made up of only elements and no compounds? explain.

Answers

yes , because all elements are made of atoms and elements are the building blocks of the universe because everything is made of elements, therefore all matter is made up of atoms and compounds are made of elements, which are made up of atoms sooooo yes you can only make a mixture with elements and compounds

How many moles of oxygen react with hydrogen to produce 22.8 mol of H2O? The balanced equation is as follows: 2H2 + O2 → 2H2OHow many grams of CO2 are produced if 35.48 mol of HCl are reacted according to this balanced chemical equation? CaCO3 + 2HCl → CaCl2 + CO2 + H2O

Answers

2H₂ + O₂ → 2H₂O
$(22.8 mol H2O)/(1)$ * $(1mol O2)/(2 mol H2O)$ =
11.4 mols O₂

CaCO₃ + 2HCl → CaCl₂ + CO₂ + H₂O
$(35.48molHCl)/(1) * (1 mol CO2)/(2 mol HCl) * (44.01 grams CO2)/(1 mol CO2)$ =
780.7 grams CO₂

hope this helped!

Sodium(na) is a highly reactive metal and chlorine is a poisonous gas. Which compound do they form when they chemically combine?

Answers

Sodium lose one electron and convert into sodium ion Na+

Chlorine lose one electron and form Cl- ion

When these ions come together they from an ionic compound NaCl,

table salt

The ionic compound which consist ionic bond. The ionic bond is a type of bond which formed between positive and negative ions or metal, sodium and non-metal , chlorine

It would form into NaCl because Na has a +1 charge while Cl has a -1 charge.

What properties you can observe or measure?

Answers

We can observe physical properties of elements and compounds without changing the substance.

Examples of physical properties: Density, color, boiling point, state of matter, appearance: dull or shiny, etc.

But we can also observe and measure chemical properties by reacting a substance with something else. For example, like mixing baking soda and vinegar together. The vinegar reacts with the baking soda and produces carbon dioxide: a new substance.

Some examples of chemical properties: Flammability, amount of heat that is released during combustion, toxicity (how much damage it causes to other organisms), radioactivity, and ability to oxidize (when you have metal that becomes rusty looking).

. Which type of energy is involved in the operation of simple machines?