1. Look and list five items or products at home that are made of elements.

Q: Using white and black circles to represent different kinds of atoms, make a drawing that accurately…

A: Given samples of matter,         A solid element, a liquid compound, and a heterogeneous mixture.

Q: 39 Which event is an example of a physical change? (1) iron rusting (2) fireworks exploding (4) ice…

A: The changes in the appearance of the substance is called as the physical change. Physical changes…

Q: Is matter continuous or made of tiny particles? Explain your answer and cite evidence from your life…

A: A matter is any substance that occupies space and has a definite mass. Hence anything that we see in…

Q: Compare the amount of copper predicted in part A with the amount measured in part B. What percentage…

A: Predicted copper amount=0.9918 Actual amount of copper produced= 0.72

Q: 1. Imagine if you could zoom in to each state of matter. Draw 10 particles in each state to show how…

A: The three states of matter are the three distinct physical forms that matter can take in most…

Q: Sugar is a compound made of the elements carbon, hydrogen, and oxygen. If you add sugar to water,…

A: In this question, we have to distinguish between compound and mixture.

Q: Which substances are molecular substances? water in glass ice in glass motor oil mineral spirits…

A: Here we have to determine the following materials which are molecular substances

Q: Which of these are pure substances? L Steam II Crude oil II. Salt water IV. Gun powder V. Oxygen VL…

A: Since you have asked multiple questions, as per our guidelines,we are supposed to answer only one…

Q: Am I right? Sample 1 2 3 Calculations for sample 1 Mass of aluminum dish   1.24g 1.26g…

A: Percentage of water  = mass of watermass of anhydrate  x 100

Q: Answer the statement with TRUE or FALSE and explain why: Unity is not the result of evolutionary…

A: Both unity and diversity are explained by evolution. When all the living things depend upon the…

States of Matter

The substance that constitutes everything in the universe is known as matter. Matter comprises atoms which in turn are composed of electrons, protons, and neutrons. Different atoms combine together to give rise to molecules that act as a foundation for all kinds of substances. There are five states of matter based on their energies of attraction, namely solid, liquid, gases, plasma, and BEC (Bose-Einstein condensates). 

Chemical Reactions and Equations

When a chemical species is transformed into another chemical species it is said to have undergone a chemical reaction. It consists of breaking existing bonds and forming new bonds by changing the position of electrons. These reactions are best explained using a chemical equation.