CHEMISTRY MIDDLE SCHOOL

Everything in the universe is
made up of what?

Answers

Answer 1
Answer: Matter and energy, and both these things are made up of atoms

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Which of the following is a physical change?-Burning
-Rusting
-Freezing
-Oxidation

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Freezing is a physical change caused by temperature. 
The others cannot be undone easily, because the chemical structure has changed.

A negative ion has moreA. protons than electrons
B. electrons than protons
C. neutrons than protons

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a negative ion has more electrons than protons (b)

True or False: the force of attraction that holds two atoms together is called a chemical bond

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The answer is true.

Answer:

true

Explanation:

k12

How would you classify elements from compound

pa answer po need ko 4 sentence

Answers

Answer: Elements are pure substances which are composed of only one type of atom. Compound are substances which are formed by two or more different types of elements that are united chemically in fixed proportions.

Cl_(2) consists of 2 Cl atoms.. although its the same type. So it is an element.

Water (H_(2) O) consists of 2 different atoms. (hydrogen and oxygen) hence is a compound.

What does FE stand for in the Periodic Table of Elements?

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FE stands for iron in the Periodic Table of Elements.

Iron is a chemical element with the atomic number 26 and the symbol Fe, derived from the Latin word "ferrum." It is a transition metal and belongs to Group 8 and Period 4 of the periodic table.

Iron is well-known for its distinctive qualities, including its tremendous strength, silvery-gray colour, and magnetic tendency. It is an essential component in the creation of steel and is necessary for many biological activities, including the transfer of oxygen in the blood. Iron compounds are frequently employed in both industrial settings and daily life.

Learn more about Iron, here:

brainly.com/question/31984794

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It stabds for Iron.

Why do the particles of objects have both kinetic and potential energy?  

Answers

The particles of objects have both kinetic and potential energy because these forces are drive by the force of motion or stillness of an object. Potential energy is the a type of energy which an object possess however without motion. Kinetic energy in the other hand, is the energy in motion or if the object moves along from one space to another with respect to time. They both have these two energies by the presence of atoms in these entities.



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