Login or Sign Up
Menu
Ask a New Question

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

Responses

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

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

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

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

Responses

made of one atom.
made of one atom.

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

made of one type of atom.
made of one type of atom.

made through chemical reactions.

made of one type of atom.

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 is important in understanding substances because it allows us to visually represent the structure and arrangement of atoms within a molecule. This helps us visualize how the atoms are bonded together and how they interact with each other, aiding in our understanding of the substance's properties and behavior.

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.

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. According to this law, mass is neither created nor destroyed in a chemical reaction, so the total mass of the reactants must equal the total mass of the products.

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

During a chemical reaction, reactant molecules collide and undergo rearrangement of their atoms, forming new chemical bonds or breaking existing ones. The reactants are the initial substances that interact with each other in the reaction. As the reaction progresses, these reactants transform into products, which are the resulting substances formed after the reaction is complete. Bonds between atoms are either formed or broken during the chemical reaction, leading to the creation of new substances with different chemical properties from the original reactants. This process involves the conversion of reactant molecules into product molecules through the rearrangement of atoms and bond formation or breaking.

say it like a 7th grader wrote it