Concept explainers
Interpretation: The symbol for the elements, the number of electrons, protons and neutrons present in the element should be filled in the blanks of the given question.
Concept Introduction:
Periodic Table: The available chemical elements are arranged considering their
In periodic table the horizontal rows are called periods and the vertical column are called group. There are seven periods and 18 groups present in the table and some of those groups are given particular name as follows,
Atomic Number: Atomic number of the element is equal to the number of protons present in the nucleus of the element which is denoted by symbol Z. The superscript presents on the left side of the
Mass number: It is given by the total number of protons and the neutrons present in the nucleus of the element and it is denoted by symbol A. The subscript that lies on the left side of the symbol of the element represents the mass number.
Cation: Removal of electron from the atom results to form positively charged ion called cation.
Anion: Addition of electron to atom results to form negatively charged ion called anion.
The net charge present in the element denotes the presence or absence of electrons in the element.
To identify: The number of protons, Neutrons, electrons and the symbol representing the element
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Chemistry: Atoms First
- Fill in the gaps in the following table:arrow_forwardHypothetical elements X and Y form a molecule XY2, in which both Y atoms are bonded to atom X (and not to one another). The X—X distance in the elemental form of X is 204 pm, and the Y—Y distance in elemental Y is 168 pm. What would you predict for the X—Y distance in the XY2 molecule? Explain your answer.arrow_forwardLithium Oxide (Li20) is a highly reactive chemical species which reacts to give electrons to other atoms, following a general reaction scheme of: Li20 + X → LiX + O2 Data were collected from a series of reactions involving lithium oxide and one other element. Element Reacts with Li,0 Fluorine Yes Oxygen Yes Nitrogen Yes Carbon Yes Boron No Beryllium No Lithium No Which statement is best supported by the evidence in the table?arrow_forward
- Fill in the blank portions of the table.arrow_forwardThird Math X Microsoft T x Microsoft Te x DOCX File v X 4. Personal - → C A app.edulastic.com/student/assessment/60525b29af74cf0008c2b68f/class E- > NEXT Question 17/19 A BOOKMARK 17 Use the image of a partial periodic table to answer questions 17, 18 and 19. 18 2 Не H. 1 Hyder 2 Hellum 4.00 101 13 14 15 16 17 4. 6. C 8 10 Ne 2. Li Be B N F Lthum 694 Berylum Borge Carton 10.81 1 12.01 Devgen 16.00 Puine Neon 20.18 9.01 14.01 19.00 11 12 13 14 15 16 17 18 Ar Na Mg sum 24.31 Al CI 3. Sodum 22.99 Si See 26.09 Aumin Argon 39.95 Cherine 3. 30.97 26.98 32.06 15 45 19 K 31 20 21 32 Ge 33 As 34 Ca Sc 35 Br 36 Kr Ga Caum 69.72 Se ... Protacsum 39. 10 Caldum 40.08 Arsenir Sele Bromine 44.96 72.63 74.92 78.97 79 90 3.80 38 37 Rb 39 Y. 49 50 Sn 51 Sb 52 53 54 Sr In Te Xe ... Srentium erum due 114.82 emony Taluum Jodine 5.47 87.62 118.71 121.76 127.60 126.90 131.29 Which elements have more protons per atom than phosphorus? bromine and sulfur B helium and nitrogen nitrogen and sodium sodium and…arrow_forwardPlease fill in the rest of this tablearrow_forward
- Fill in the blanks in the table belowarrow_forwardSalt Formation & Formulas K(s) + Br₂ (8) K (s) Li (s) F2 (g) + F₂ + N₂ (8) Ca + Cl₂ (8) (s) Na 02 (8) (s) + Al (s) + Cl₂ (g) → potassium bromide potassium fluoride lithium nitride calcium chloride sodium oxide aluminum chloride 2 3 4 5 6 7 ΤΑ Using what you know about predicting ion charge, ionic bonding, and the criss-cross technique, write neutral salt product formulas for these synthesis equations. 2A 2 A ú Be 6.94 90122 12 Na Mg 22990 24.305 K C 34 39.00 40.078 44.956 37 87 Fr G B₁ 13291 137.33 charge 3B 4B 5B 6B 7B 8B 9B 10B IIB 12B 3 10 11 12 H (223) (236) 36 53-71 72 73 Hr Ta 74 178.49 180.95 183.84 88 99-103 104 105 P₂ Ra Rf Db Lanthanide series #Actinide series group A num 11 V 47367 50.942 51.996 54.938 43 & Nb Mo Tc Ru Rh Pd Ag Cd CSSE 85.468 87.62 88.906 91.224 92.906 95.95 (9) 75 191.07 102.91 106.42 10787 11241 114.82 118.71 121.76 127 60 17 78 10 81 14 Os Ir P A H₂ 186.21 190.23 192.22 195.08 196.97 20039 204.38 108 109 110 III 112 113 Bh Hs Mt Ds Ca Nh (270) Pb N Pa At…arrow_forward16. It has been said, “The number of protons determines the identity of the element.” Do you agree or disagree with this statement? Explain.arrow_forward
- One application of conductive polymers is in photovoltaic solar cells. Such devices have traditionally been silicon based. What possible advantages might conducting polymers offer?arrow_forward2-73 (Chemical Connections 2D) Copper is a soft metal. how can it be made harder?arrow_forward2-99 A 7.12 g sample of magnesium is heated with 1.80 g of bromine. All the bromine is used up, and 2.07 g of magnesium bromide is produced. What mass of magnesium remains unreacted?arrow_forward
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