Which are particles that make up the nucleus of an atom? Select the two correct answers. (1 point)
A. electrons
B. bozons
C. protons
D. neutrons
E. muons
Which is true of an element?
A. can be made up of multiple types of atoms
B. can be either a compound or a molecule
C. has a unique number of protons; if the element were to lose a proton, it would become a different element
D. has a unique number of electrons; if the element were to lose an electron, it would become a different element
Two different types of elements are combined so that they look like one substance, but they are not bonded together. What could the result be?
A. a compound
B. a solution
C. an element
D. a heterogeneous mixture
Elements can chemically combine with other elements to form which of the following?
A. solutions
B. other elements
C. impure substances
D. compounds
Two different chemicals react and bond together. What do they become?
A. an element
B. a mixture
C. a solution
D. a compound
A. protons and D. neutrons are the particles that make up the nucleus of an atom.
C. has a unique number of protons; if the element were to lose a proton, it would become a different element.
D. a heterogeneous mixture.
D. compounds.
D. a compound.
3 isn't right but thx
I apologize for the mistake. For the element combination without bonding, the result could be a heterogeneous mixture (D).
To answer the questions, let's go through the options one by one:
1. Which particles make up the nucleus of an atom?
The correct answers are C. protons and D. neutrons. Electrons are not found in the nucleus of an atom. To determine the correct answers, you can recall the basic structure of an atom. The nucleus, located at the center of an atom, consists of protons and neutrons, while the electrons exist in the electron cloud surrounding the nucleus.
2. Which is true of an element?
The correct answer is C. has a unique number of protons; if the element were to lose a proton, it would become a different element. This is because the number of protons uniquely identifies an element. If an element loses or gains protons, it will become a different element. Option A is incorrect because an element is made up of only one type of atom. Option B is incorrect because an element can be neither a compound nor a molecule. Option D is incorrect because the unique number of electrons is related to the element's properties, but losing an electron does not change the element itself.
3. Two different types of elements are combined so that they look like one substance, but they are not bonded together. What could the result be?
The correct answer is D. a heterogeneous mixture. A heterogeneous mixture is a combination of substances that are not chemically bonded together. In this case, since the elements are not bonded but appear as one substance, it would be considered a heterogeneous mixture. Options A, B, and C are incorrect because they involve bonding or being a single element.
4. Elements can chemically combine with other elements to form which of the following?
The correct answer is D. compounds. When elements chemically combine, they form compounds. In compounds, the atoms of different elements are bonded together in specific ratios. Options A, B, and C are incorrect because they do not accurately describe the result of elements chemically combining.
5. Two different chemicals react and bond together. What do they become?
The correct answer is D. a compound. When two chemicals react and bond together, they form a compound. A compound is a substance made up of two or more elements chemically bonded together. Options A, B, and C are incorrect because they do not accurately describe the result of the chemical reaction and bonding between the chemicals.
By understanding the basic concepts of atoms, elements, mixtures, and compounds, you can select the correct answers to these questions.