Answer: A single covalent bond is created between carbon and each of the 4 hydrogen atoms. Why:Carbon shares a pair of electrons through each of the 4 hydrogen atoms. A pair of mutual electrons is the basis of a single covalent bond.
You are watching: Which subatomic particles contribute to an atom’s mass number but not its atomic number?
Answer:the atomic mass of the corresponding atom Why:Note just how the amount of the variety of protons and also neutrons in the equivalent atomic structures is equal to the shown atomic mass.
Bonds in between carbon and hydrogen atoms (as depicted on the right side of the figure) are mostly ______.
Answer:nonpolar covalent bondsWhy:Neither carbon nor hydrogen is considered electronegative atoms. Therefore, neither atom has an overly strong pull on mutual electrons, and those electrons are common equally within a nonpolar covalent bond.
Answer:ionic bondWhy:An ionic bond is created throughout the complete deliver of one or even more electrons from one atom to one more.
Answer:prolots and also neutronsWhy:In a typical atom, the prolots and neutrons "hang out" together in the center of the atom—the nucleus. Electrons are constantly uncovered orbiting around the nucleus.
Answer:neutronsWhy:tomic number is the number of prolots in an atom, but mass number is calculated by including both the number of protons and also the number of neutrons in an atom.
An atom of oxygen has actually an atomic variety of 8 and a mass number of 18. How many kind of of each form of subatomic pwrite-up does it contain?
Answer:8 protons, 8 electrons, and also 10 neutronsWhy:The atomic number is the variety of proloads in an atom, and it will certainly have actually the same number of electrons, to balance the electric charge. Mass number is the variety of prolots plus the number of neutrons, so subtracting atomic number from mass number reveals the number of neutrons. The variety of protons and electrons is constant for all atoms of any element, however the number of neutrons can differ. Atoms of the very same element that differ in the number of neutrons are called isotopes.
Answer:falseWhy:The atomic variety of any kind of atom is equal to the number of protons, not neutrons, in its nucleus.
Except for elements 1 and 2, all other facets are stable via exactly how many type of electrons in their outermany (valence) power level?
Answer:8Why:Elements 1 and 2 are secure via a maximum of 2 electrons in their outermost (valence) energy level (electron shell). All other facets are secure through eight electrons in their valence shell.
Answer:an atom that has either gained or shed electron(s)Why:Ions create once atoms obtain or lose electrons to achieve a full valence shell, which gives them an electrical charge. Ions deserve to be stored in the body, such as ions of calcium and phosphate that are stored in our bones, or can be obtainable individually for many type of physiological procedures. For example, Na+ is required for muscle contractivity, nerve impulse conduction, and also regulation of blood press.
Answer:the outermost electronsWhy:In ionic bonding, the atoms" outerthe majority of electrons—the valence electrons—are closest to each other and will interact, which leads to bond formation.
Answer:Ions of oppowebsite electric charges are attracted to each other to balance the charges. Why:Ions of oppowebsite charges are drawn together to balance out their charges. Once they bond, they form an ionic compound that have the right to keep and deliver the ions, or dissociate (separate), releasing the ions, which deserve to then be provided by the body.
Calcium"s atomic number is 20. It creates ions via 18 electrons. What is the electrical charge of a calcium ion?
Answer:+2Why:With atomic number 20, calcium atoms have 20 positive protons, and also the ion has just 18 electrons, which means the net charge is +2. Calcium ions are important for muscle contractions, nerve impulses, and also bone maintenance.
Answer:neutronsWhy:Keep in mind that these atoms each contain one proton, and are therefore variations of the exact same element that each differ in the number of neutrons.
Answer:the bond formed as soon as shared electrons occupy a solitary orbital prevalent to both atoms within a molecule Why:Electron sharing produces molecules in which the shared electrons occupy a single orbital common to both atoms, which constitutes a covalent bond.
Answer:oxygenWhy:Oxygen and sulhair both have actually 6 electrons in their valence (outermost) electron shells. Thus, they will create comparable forms and also numbers of bonds with other atoms.
Answer:carbon, oxygen, hydrogen, and also nitrogen. Why:Four elements: carbon, oxygen, hydrogen, and nitrogen consist of about 96 percent of our body weight; 20 others are present in the body, some in map amounts.
Answer:falseWhy:Polar molecules are the outcome of unequal electron pair sharing. Nonpolar molecules are electrically well balanced as a result of the equal sharing of electrons between the atoms of the molecules.
An element has actually an atomic number of 17 and also a mass of 35. How many kind of proloads, neutrons, and also electrons does the facet have?
Answer:17 protons, 18 neutrons, and also 17 electrons Why:The mass number is the sum of proloads and also neutrons in the atom. The atomic number is the variety of protons in the atom. The variety of prolots amounts to the variety of electrons in a chemically inenergetic atom.
Answer:falseWhy:Organic compounds are covalently bonded and also they constantly contain carbon; they frequently contain oxygen too.
Answer:oxygen gasWhy:Oxygen is a molecule bereason it consists of the facet oxygen just. The various other selections are molecules of compounds because they contain two or even more various kinds of facets.
Answer:4 amuWhy:The helium atom shown contains two prolots and 2 neutrons which add to a complete mass of 4 amu. The two electrons do not add to the determination of atomic mass.
Which of the complying with forms of energy travels in differing wavelengths, such as visible light, infrared waves, radio waves, ultraviolet waves, and X-rays?
Answer:electromagnetic energyWhy:Radiant energy, or electromagnetic energy, travels in waves. These waves, which vary in size, are jointly dubbed the electromagnetic spectrum. They include visible light, infrared waves, radio waves, ultraviolet waves, and also X rays.
Answer:falseWhy:Colloids, not suspensions might likewise be dubbed emulsions. Colloids are heterogeneous mixtures, meaning their composition is disequivalent in various areas of the mixture. Colloids regularly show up translucent or milky and also although the solute pwrite-ups are bigger than those in true remedies, they still execute not resolve out. Suspensions are heterogeneous mixtures via large, often visible solutes that tfinish to clear up out.
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Which of the adhering to is formed once the ions in the salt crystal have actually entirely dissociated from one another?
Answer:a solutionWhy:Once dissociated, the sodium and also chloride ions would be intended to disperse uniformly among the neighboring water molecules. This homogenous mixture is dubbed a solution.