Q: Compared with 31P, the radioactive isotope 32P has(A) a different atomic number.(B) one more…
A:
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: Generally YAC contains how many elements?a) 1b) 2c) 3d) 4
A: YAC stands for yeast artificial chromosomes and is widely used in the field of genetic engineering.…
Q: Which of the following wavelengths in the electromagnetic spectrum has the most energy? a.…
A: Wavelength is considered as the distance between two consecutive crests and troughs.
Q: An atomic nucleus can be described by the analogy “like a marble in the Dallas Cowboys Stadium.” If…
A: Atoms are made up of particles called protons, neutrons, and electrons which are responsible for…
Q: Choose the element Calcium (Ca) from the periodic table that is found in the human body, and write…
A: In the periodic table, one of the alkaline-earth metals of group IIa is found to be calcium. This…
Q: With the exception of He, elements with two valence electrons will be considered: O Metals…
A: A valence electron is an electron that is associated with an atom, and that can participate in the…
Q: An isotope of sodium (Na) has a mass number of 22 and an atomic number of 11.how many neutrons does…
A:
Q: Which elements in each pair is more metallic? Silicon or aluminum
A: Introduction: A pure substance that can't be separated by compound methods, comprising of molecules…
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: What element does not react with other elements? Group of answer choices A. hydrogen B. helium C.…
A: Noble gases These are group 18 elements of the periodic table. They are usually chemically inert.…
Q: Arrange in order of increasing atomic size. (a) the period 2 elements Li, C, and F (b) the group…
A: According to the question, we have to arrange the following period or group elements in order of…
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: a certain element consists of two stable isotopes. the first has a mass of 138 amu
A: Atoms of an element having same atomic number but different mass number are called isotopes of that…
Q: Select the best answer or answers from the choices given: The mass number of an atom is (a) equal to…
A: The mass number of an atom is:
Q: In the accompanying figure, the atomic number refers to the:
A: The given is C (carbon) The atomic number is 6 The mass number is 12
Q: Mobile phase can be : A) Solid or liquid B) Only solid C) Only gas D) Liquid or gas
A: Chromatography is a technique that is used to separate different components of a mixture as a result…
Q: If we removed a neutron from an atom, what would happen to the atom? Group of answer choices: a) its…
A: Atoms are the smallest unit of any matter in the universe. The electron revolves around the atoms in…
Q: if 10 magnesium atoms and 10 chlorine atoms were allowed to bump into each other, could they combine…
A: The study of chemical reactions that occurs within living organisms is called biochemistry. This…
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: Choose an element from the periodic table that is found in the human body, and write five sentences…
A: All the living organisms are composed of mainly CHON. P and S are second most important elements.…
Q: stance which cannot be broken down by chemical means into simpler substa OA. Matter OB. A Mineral…
A: The periodic table is a display of all the discovered chemical elements in the form of a table for…
Q: Elements are.. O A pure substance When there is more than one atom O Made of two or more substances
A: The matter is made up of chemical substances that occupy space and it consists of a particular mass.…
Q: Malnourishment results when there is
A: Malnutrition refers to obtaining deficient or an excessive amount of of sure nutrients. It will…
Q: If you add an electron to fluorine, what will result? A) a negatively charged anion O B) a different…
A: Anion: negatively charged ion. Cation: positively charged ion.
Q: A Determine how much sodium and similar elements are normally found in the human booy B. Determine…
A: Asked : Reason for element are safe for humans to consume from given options.
Q: If an atom has an atomic number of 6 and an atomic mass of 14, that means it must have _____…
A: The atomic number is the number of electrons present in an atom. The atomic mass number is defined…
Q: A metal ion with a 2+ charge has 23 electrons and forms a compound with a halogen ion that contains…
A: As we know that atomic mass is the addition of proton and neutrons present in the nucleus, whereas…
Q: A student drew atomic models of four elements. Tin, because it has five energy levels with four…
A: Neon - It's a chemical element, it's symbol is Ne and it's atomic number is 10 , it's a nobel gas,…
Q: An isotope of sodium (Na) has a mass number of 22. How many neutrons does it have?a. 11b. 12c. 22d.…
A: Isotopes are members of a family of an element that all have the same number of protons but…
Q: ionic bonds involve_____ a)electrostatic attraction b)sharing electrons c)valence configuration
A: An attraction between molecules or atoms is termed as atomic or molecular bond. They are of many…
Q: (4) The normal melting point of gold is 1064.5 °C and its boiling point is 2660 °C. (a) Convert…
A: Temperature is measured in 3 different scales namely Celcius, Fahrenheit, and Kelvin. Celcius is…
Q: Nonsilicates are a group of minerals that DO NOT contain what two elements? A. silver and gold B.…
A: Answer-B. Silicon and oxygen
Q: Atoms are incredibly tiny, so small that most microscopes can't even see them, but atoms themselves…
A: Atom: Atom is the smallest unit of matter. It is the basic building block of matter. Atom possesses…
Q: 44.All atoms of a given element have the same ________. Group of answer choices a.mass number…
A: An element is a basic material in the formation of all the living, nonliving, and chemical matter…
Q: If a substance contains two or more elements of different types, it isconsidereda. a compoundb. a…
A: An "element" is a pure substance that made up of only one type of atom and cannot be broken down by…
Q: Consider an electron transition from n = 3 to the n = 2 energy level in a hydrogen atom resulting in…
A: The electrons of hydrogen atoms revolve around their nucleus. They occur as a set of electrons with…
Q: What is the name of a representation of the physical world? Answer please A. Alloy B. Compound C.…
A: Every solid, liquid, gas, and plasma is composed of neutral or ionized atoms.
Q: hat do you call the smallest unit of particle in the universe?
A: According to the question the answer is: C) Nucleus Nucleus are very small and are densely packed.…
Q: Ammonia gas would be classified as (1) a compound (2) a mixture (3) an element (4) an atom
A: AMMONIA GAS IS CLASSIFIED AS COMPOUND.
Q: If a model of a hydrogen atom had a diameter of 45 cm, what would have to be the diameter of the…
A: Introduction - Hydrogen atom or its model is made up of a centrally placed nucleus or in this case…
Q: What is a proton? A. A negatively charged particle B. A positively charged particle C. An element on…
A:
Q: Alchemists were medieval scholars and philosophers who were the forerunners of modern-day chemists.…
A: The atomic number of lead is 82 while the atomic number of gold is 79. Alchemists tried to somehow…
Q: The smallest unit of an element that still retains thedistinctive behavior of that element is an…
A: Given: Choose the correct answer: The smallest unit of an element that still retains the distinctive…
Q: What is an alloy? A. A compound of two metals B. An element of two metals C. A mixture of two metals…
A: Answer- C. A mixture of two metals.
In the periodic table, the elements are arranged
according to ________ .
a. size c. mass number
b. charge d. atomic number
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- A substance formed of crystals of equal numbers of cations and anions held together by ionic bonds is called a(n) ________. a. noble gas b. salt c. electrolyte d. dipoleHydrogen bonds are a type of _____________ bond or interaction. a. ionic b. dipole–dipole c. dipole-induced dipole d. London dispersion44.All atoms of a given element have the same ________. Group of answer choices a.mass number b.number of nucleons c.atomic mass d.number of neutrons e.atomic number
- What is a proton? A. A negatively charged particle B. A positively charged particle C. An element on the periodic table D. Any particle found in the nucleus______ are monomers that form polymers called _______. a. Nucleotides; nucleic acids b. Amino acids; nucleic acids c. Monoglycerides; triglycerides d. Carbohydrates; monosaccharidesThe nucleus of an atom contains: a. neutrons and electrons b. protons and electrons c. protons only d. neutrons and protons e. neutrons only
- Smoke detectors in homes and apartments contain Am-241, which undergoes alpha decay. What is the abbreviated symbol of the "daughter nuclide" produced in the nuclear reaction? Hint: atomic number of Am is 95. A. a particle B. Pu-237 C. Am-237 D. He - 4 Е. Np-237Isotopes differ from each other only in the number of electrons they contain. Select one: a. True b. FalseAll ions have at least one ________ (select all that arecorrect).a. proton c. electronb. neutron d. all of the above
- The smallest unit of an element that still retains thedistinctive behavior of that element is an ________.a. electronb. atomc. elemental particled. isotopeRefer to the following figure (first three rows of the periodic table) to answer the questions below. What element does not react with other elements? Group of answer choices A. hydrogen B. helium C. oxygen D. siliconThalidomide is an example of how important understanding chemistry is for medicine, what is true about thalidomide? a. it is a complex molecule with no application b. it is a widely used wonder drug c. the drug exists as two isomers one is useful for medicine and the other is useful for energy d. the drug exists as two isomers one is useful for medicine and the other interfeees with fetal development e. the drug is no longer made because of the high synthesis cost
