Chemistry Middle School

What is the number above each symbol in the periodic table?
A.atomic number
B. chemical symbol
C.atomic mass
D.none of the above

Answers

Answer 1
A. Atomic Number is the answer.
Answer 2

Answer:

atomic number

Explanation:

there are 118 elements. Some tables includes on the right side of the symbol is the atomic mass.

Hope this help. :)

Related Questions

What has compounded the tremendous increase in human population in the last few decades? Select all that apply.
agriculture
houses
technology
tools

Answers

Answer:

technology

Explanation:

because people will go to placed with more technology

Technology
Because technology has influenced our way of thinking and understanding

List the five physical phase changes of matter and give one example for each.

Answers

Answer:Melting.

Freezing.

Evaporation.

Condensation.

Sublimation.

Explanation:

Answer: Examples for the five transformations previously given.

For the first four, we encounter common examples in everyday life, all to do with water:

Freezing - liquid to solid, e.g. water to ice, e.g. making ice cubes.

Melting - solid to liquid, e.g. ice to liquid water, melting ice cubes or snow flakes.

Condensation - gas to liquid, e.g. water vapor (gas) to liquid -  water vapor in air (humidity) condenses to form liquid droplets on the outside of a cold beverage glass on a hot humid day; or cloud formation  in the atmosphere.

Evaporation - liquid to gas, e.g. liquid water on clothes evaporates as clothes dry on clothesline or in dryer

While water can sublime under certain conditions of temperature and pressure, it is less evident in everyday life.  Carbon dioxide however is a more common example.

Sublimation - solid to gas, e.g. "dry ice" disappearing. The visible smoke associated with dry ice is most likely just condensing water vapor in the air as the solid carbon dioxide cools the air.

Explanation:

Match each letter with the correct label. Use the atom diagram below.

Electron - Nucleus - Proton - Neutron

Answers

D= nucleus
C= protons
B= neutron
A= electron

Answer:

Explanation:  First and foremost, we must carefully examine the provided diagram in order to properly name the sections of an atom diagram.

Step-by-step instructions are given along with the answers in sequential sequence.

Correct answer for (A) is Electron since they are present at the outermost shell of an atom.The correct answer for (B) is Neutron since it is the central element of an atom.The proton is the right answer for (C), as it is included in the nucleus grouping with the neutron.The nucleus is the correct option for (D) since it is the primary component of the atom and includes both protons and neutrons.

Learn more about the Atom here:

https://brainly.com/question/12578802

In a solution, what is the substance that is dissolved called? HINT: It is always in a smaller amount.

A) solvent
B) solute
C) precipitate
D) saturated

Answers

Answer: B

Explanation:

solvent: dissolves (large amounts)

solute: dissolves (smaller amounts)

precipitate: deposited in solid form

saturated: greatest number of hydrogen atoms  

hope this helps

Answer is : B solute

PLEASE HELP QUARTER TWO IS ALMOST OVER AND I HAVE TO TURN THIS IN TODAY!!!

Answers

Answer:

5. Sensory transduction is the translation of the sensory stimulus into neuronal activity.  It involves a variety of physical and chemical mechanisms.

6. The central nervous system is made up of the brain and spinal cord. The peripheral nervous system is made up of nerves that branch off from the spinal cord and extend to all parts of the body.

7. The peripheral nervous system refers to parts of the nervous system outside the brain and spinal cord. It includes the cranial nerves, spinal nerves and their roots and branches, peripheral nerves, and neuromuscular junctions.

8. When a pin is poked in the finger the signals are received by the sensory neurons and it is sent to the brain via the spinal cord. The signals are processed (for removal of the hand) and sent toward the muscles by the motor neuron.

How is a mixture different from a pure substance?


A) Mixtures can be separated by physical means.

B) A pure substance is heterogeneous.

C) Pure substances are made up of mixtures.

D) A mixture is made of one substance.

Answers

Explanation:

Neani madhungo haya thoho I a teaho

B, A pure substance is heterogeneous
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