Refer to the periodic table and find the following information:a. the symbol of the element with an atomic number of 40b. the atomic mass of the element sodium (Na)c. the element whose atoms contain 24 protonsd. the known element that should most resemble the recently discoveredelement ununseptium, with an atomic number of 117

Q: QUESTION 2 The maximum number of electrons that can occupy the 3rd shell (3rd floor) of an atom is…

A: 3rd shell has three sub shells s, p and d. s can posess 2 electrons. p can posess 6 electrons. d can…

Q: 12. How many protons, neutrons, and electrons are in the following? a. 1 atom of iodine-127 b. 1…

A: Since we know that  Atomic number = number of proton  Mass number = number of protons + number of…

Q: 3. Write the name and symbol for each of the elements described below) a. Halogen in Period 4 b.…

A: By using this period table we can get the answer for the given questions .

Q: 1. What specific material(s) is (are) used and what specific properties this (these) material(s)…

A: The objective of the question is to find the specific material used for the given items and its…

Q: Changing the number of electrons in an atom changes the atom’s..

A: Atomic Charge

Q: Naturally Occurring Isotopes of Copper Atomic Mass Isotope (atomic mass units, u) 62.93 64.93 Cu-63…

A: Cu - 63 atomic mass = 62.93 amu Abundance = 69.17% Cu - 65 atomic mass = 64.93 amu Abundance = 30.83…

Q: If two neutral atoms are isotopes of each other, which of the following statements are true. More…

A:

Q: Atomic Radius decreases as you move left to right even though there are additional protons ,neutrons…

A: Atomic radius decreases as you move left to right even though there are additional protons, neutrons…

Q: Cations are Select one: O a. charged subatomic particles O b. atoms that have gained electrons O c.…

A: In an atom contains equal numbers of protons and electrons. A proton is positively charged subatomic…

Q: Which of the following is not true about the isotope nickel - 58? Select one: O a. It has a mass…

A: Nickel - 58

Q: Choose all of the following that apply to oşmium, Os. a. Metalloid b. Alkali metal Oc. Transition…

A:

Q: Which of the following is true about the atom represented by the symbol: 39 19K? This atom has:   a.…

A: Welcome to bartleby !

Q: 3. What is the symbol for the element in group 7 and series 5? a. Nb b. Db c. Te . Bh e. None of the…

A: In the periodic table, group 7 elements are Mn, Tc, Re and Bh. In the above elements, Tc is present…

Q: Using the periodic table, determine the following. a. The atomic number of the element magnesium b.…

A: The atomic number of element magnesium. In the the periodic table, magnesium was placed at third…

Q: 14. The table shows the number of subatomic particles in Atom X and Atom Z. Atom X Z # of protons #…

A:

Q: What is correct from multiple choice

A: Dalton’s Atomic Theory: Atoms are the indivisible building blocks of all matter and cannot be…

Q: What is the symbol for the lightest alkali metal with three neutrons? Select one: a. H b. Li c. B…

A: Lithium Lithium is an alkali metal with the atomic number = 3 and an atomic mass of 6.941 g/mol.…

Q: The isotope of an unknown element, X_ has a mass number of 77. The most stable ion of this isotope…

A: Number of protons = atomic number  Number of protons = number of electrons (in neutral atom)…

Q: Which of the following atoms would you expect to be smallest in the follow set of elements?   A.K…

A: In the periodic table, left to right size of the atom is decreases and up to down increases. Argon…

Q: Write the element symbol that fi ts each description. Use a superscript for the mass number and a…

A: a) an element that contains 10 protons and 12 neutrons Ne1022 b) an element with atomic number 24…

Q: for elements (Br, Ca, Fe, Na, S, Si, and Xe) which of the following term(s) apply? a. metal b.…

A: To classify the elements we have see in which block of the periodic table  the given element is…

Q: Which element is below is not classified as a lanthanide or actinide a. Ceb. Smc. ud. Fre. All…

A: The objective of the question is to identify the element that is not classified as a lanthanide or…

Q: What element is represented by X in the atomic symbol notation 195 is over 78X ? Select one: A.…

A: The objective of the question is to identify the element represented by X in the atomic symbol…

Q: QUESTION 18 The first scientist introduced the quantum concept that radiation is not emitted in…

A: Quantum concept that radiation is not emitted in continues amount but in discreet bundles of energy.

Q: How many valence electrons does each of the following elements have? a. Bromine b. Carbon c. Lithium

A: Number of valence electrons in an atom is equal to the number of electrons in the outermost shell.

Q: What is correct from multiple choice

A: Since the symbol of Hydrogen is H and not He Hence option b is correct answer

Q: a sample of the element boron with have some atoms with six neutrons and some atoms with 5 neutrons;…

A: Given is a sample of biton atoms, of which some contain 5 neutrons and some contain 6 neutron. We…

Q: Put the correct option in the correct plank. 1. Dalton 2. isotopes 3. shells 4. electron 5.…

A: Atomic theory was given by Dalton.

Q: An element has 2 naturally occurring isotopes with the following masses and abundances. A. Calculate…

A: Given  2 Naturally occurring Isotopes of an element  Isotope mass = 34.97 amu Percentage abundance…