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Hey Bot, can you help with science?

Sure! I'll do my best. What do you need help with in science?

What will make an atom without an electrical charge? (1 point)

Responses

An equal number of protons and electrons, because electrons are positively charged and protons are negatively charged.

An equal number of neutrons and electrons, because neutrons are positively charged and electrons are negatively charged.

An equal number of protons and electrons, because electrons are negatively charged and protons are positively charged.

More electrons than protons, because electrons are negatively charged and protons are positively charged, and electrons are much smaller than protons

An equal number of protons and electrons, because electrons are negatively charged and protons are positively charged.

If a substance is made of a single element, it is(1 point)

Responses

made of one atom.

made of one type of atom.

made of multiple types of atoms that have chemically bonded together.

made through chemical reactions.

made of one type of atom.

Question

The image shows a model of sulfuric acid. In the middle is one yellow ball. Four red balls are attached to the yellow ball with sticks. Two of the red balls have a blue ball attached with sticks. In total, there is 1 yellow, 4 red, and 2 blue balls.

The image is a model of sulfuric acid that has a chemical formula of H2SO4. In 1-2 sentences, explain why creating models, like the one shown in the image above, is important in understanding substances.

(2 points)

Creating models like this one is important in understanding substances because they allow us to visualize the arrangement of atoms and better understand the structure and properties of the substance.

Use the chemical equation to complete the activity.

2Cu+S→Cu2S
Copper (Cu) reacts with sulfur (S) to form copper sulfide as shown in the equation. A scientist adds 12.7 grams of Cu to 3.2 grams of S to start the reaction. In this reaction, all of the copper and all of the sulfur react. Before running the experiment, the scientist expected the products of the reaction will be a total of 15.9 grams of copper sulfide (Cu2S). In 1–2 sentences, explain the law that the scientist used to predict that the product of the reaction would be 15.9 grams of copper sulfide.

(2 points)

The scientist used the law of conservation of mass to predict that the product of the reaction would be 15.9 grams of copper sulfide. This law states that the mass of the reactants must equal the mass of the products in a chemical reaction.

In 3–5 sentences, describe what happens during a chemical reaction, using the terms reactant, product, and bond. (4 points)

During a chemical reaction, reactants react with each other by forming and breaking chemical bonds, resulting in new substances called products. The reactants are the initial substances present before the reaction, while the products are the substances produced from the reaction. Bonds are the connections between atoms in a molecule or compound and are either formed or broken during the reaction, depending on the nature of the reaction. Overall, a chemical reaction involves the rearrangement of atoms through the formation and breaking of chemical bonds to produce new substances with different properties.

In 3–5 sentences, describe the difference between a chemical property and a physical property.(4 points)

A physical property is a characteristic of a substance that can be observed or measured without changing its chemical composition. This includes properties such as color, density, melting point, and boiling point. A chemical property, on the other hand, describes the ability of a substance to undergo a chemical reaction or change in composition. For example, the flammability of a substance is a chemical property because it describes its ability to react with oxygen and undergo combustion. Physical properties can often be used to help identify a substance, while chemical properties describe how it interacts with other substances.

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