Which of the following statements is incorrect? a. Isotopes have the same atomic number and different mass numbers. b. Atoms have about the same number of electrons as protons. c. All molecules consist of atoms. d. Free radicals are dangerous because they emit energy

Q: Which parts of an element do not vary in number?a. electronsb. neutronsc. protonsd. All of these…

A: Electrons are negatively charged. Protons are positively charged. Neutrons are neutral.

Q: lons are: a. atoms or molecules with unequal numbers of electrons and protons b. atoms or molecules…

A: Question - lons are -  a.) atoms or molecules with unequal numbers of electrons and protons b.)…

Q: Smoke detectors in homes and apartments contain Am-241,

A:

Q: The atomic number of sulfur is 16, Sulfur combines with hydrogen by covalent bonding to form a…

A: Every element has smallest unit of matter called atom that retain the properties of an element.…

Q: Which of the following items are pure elements—that is, made up of only one type of atom? Check all…

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Q: The property that distinguishes an atom of one element (carbon, for example) from an atom of another…

A: An atom is made up of certain subatomic particles including protons, electrons, and neutrons. The…

Q: What is activation energy? a. The thermal energy associated with random movements of molecules…

A: Activation energy is the energy required to activate atoms during a reaction.  Lower activation…

Q: For 42He*2 The atomic number is f and there are are protons. The mass number is and there are…

A: The atomic number means number of proton in the nucleus while mass number is total number of proton…

Q: Which of the following does NOT apply to an enzyme: a. Catalyst b. Inorganic c. Protein d. All of…

A: Numerous biochemical metabolic pathways operate simultaneously in a living cell. In order to…

Q: Draw a shell model of a lithium atom (Li), which has three protons, then predict whether the…

A: An electron shell is an outside portion of the atom (outside of the nucleus) which has the highest…

Q: Isotopes differ in theira. number of protons.b. atomic number.c. number of neutrons.d. number of…

A: Isotopes are called atoms of the same element, which vary in their neutron numbers. Most isotopes…

Q: Which two of the following apply to the products of an exergonic reaction?     A. Have less energy…

A: Entropy of a system is a measure of the disorder in the system. In 1877, Ludwig Boltzmann introduced…

Q: Please explain questions 2,3,& 4 How would I know how to draw a line bond structure of a…

A: Step 1:Solution 2 :Given some statements. Draw the structural formula of the molecule.Step 2:The…

Q: 1) Compounds composed of carbon, hydrogen, and oxygen collectively are known as: a. Inorganic…

A: A compound is defined as a material that is formed when two or more chemical elements are bonded…

Q: Which of the following levels in the shell model of an atom can hold up to two electrons?   A. The…

A: The model of the shell is partially similar to the model of the atomic shell that defines the…

Q: The nucleus of an atom contains:   a. neutrons and electrons   b. protons and electrons   c.…

A: An atom is the smallest unit of matter which is indivisible.

Q: Can you answer all the parts of the question for this diagram  A:What is Structure I? B:What is…

A: Mollusca is the second largest phylum in the animal kingdom. Most of the molluscs have shells. The…

Q: 3) What defines the atomic number of an element? a. The number of electrons. b. The number of…

A: It is the number of protons in the nucleus.

Q: Please explain question 10 thoroughly.

A:

Q: Isotopes differ from each other only in the number of electrons they contain.   Select one: a. True…

A: Electrons are subatomic particles. They carry a negative charge.A proton and an electron have the…

Q: Molecules that are found in living cells and contain the element___________ are considered organic…

A: Cell, in science, the essential membrane-bound unit that contains the central molecules of everyday…

Q: he size and shape of the atomic orbitals have many important implications for bonding and…

A: Angular nodes are flat planes, ones that are found at at fixed angles. The quantum number l…

Q: The name given to the atomic particle found outside the nucleus of an atom isa. proton.b. neutron.c.…

A: The smallest particle of matter is called an atom. It is the very basic structural unit of any…

Q: A sodium atom has 11 protons and 12 neutrons. What is the atomic number of sodium? Multiple Choice…

A: Atomic number is the proton number of a chemical element. It is represented by "Z".