In the periodic table, the elements are arrangedaccording to ________ .a. size c. mass numberb. charge d. atomic number

Q: Compared with 31P, the radioactive isotope 32P has(A) a different atomic number.(B) one more…

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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…

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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.