Printed below is a table of ionic radii. The radii are given in picometers. One of the values listed is incorrect. Which one? a. N3-: 171 b. P3-: 212 c. As3-: 230 d. O2- : 213 e. S2- : 184

A sample of 6.000 g of nitrogen can be combined with 6.857 g of oxygen to form nitric oxide gas (NO). What mass of oxygen would be required to convert the same sample of nitrogen to nitrogen dioxide (NO2) instead?

en 11 of 14 Classify each statement about subatomic particles as true or false. True False Answer Bank Protons and electrons are contained in the central core of the atom called the nucleus. Electrons and neutrons have charges of the same magnitude but opposite signs. Protons are attracted to electrons. If an atom has more electrons than protons, it will be negatively charged. 1:5 コG x 司 d 9/8 63°F ^ 一国-

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6. Who discovered the nucleus of the atom? A. Dalton B. Rutherford C. Millikan D. Thomson 7. The five spheres below represent Se, Se2-, O, H, and S, not necessarily in that order. 37 pm 72 pm 100 pm 114 pm 196 pm Which answer correctly orders all five species from smallest to largest? A. O х"(g) + e B. X*(g) → X*(aq) С. Х(g) + e -> X (з) D. X*(g) + e→ X(g) 9. Which of the following compounds are insoluble? A. Pbl2 В. CaSO4 С. CSCI D. Nazs E. Both A and B 10. Assign oxidation numbers to the chlorine atom in each of the following compounds: Cl2, HCI, ClO3, CIF3, PCI3 А. О, —1, +6, +3, -1 В. О, —1, +5, +3, -3 С. 0, —1, +5, +3, —1 D. 0, -1, +3, +3, –1

Among F-, Ne, Na+, Mg2+, and Al³+, from which is an electron the easiest to remove? The atomic numbers of F, Ne, Na, Mg, and Al are 9, 10, 11, 12, and 13. There are how many significant digits in the final answer for the following calculation: 11.1 + 95.6 +222.22 0.7 ?

16. Rutherford's experiment with gold estimated the radius of a gold atom to be approximately 1 x 10⁹ cm. Suppose the radius of the nucleus is the same as a basketball. Would the volume of the atom be bigger or smaller than that of a typical domed athletic stadium? Show a little math to support your answer.

5 Nonmetals Nom Can be electrical conductors Moul Comprised of atoms Nonmetais & Metallolds BU May have no luster Hydrogen. Oxygen and Chlorine --------- Tin, Calcium and Potassium AN Silicon. Arsenic and Antimony Can exchange electrons with each other to form ionic compounds Melais & Med Metalloida

Atoms elements &compounds Chemistry Which statement about a neutron is not correct? It can be present in different numbers in atoms of the same element bave a It has no electrical charge. A partick al which is C It is always found in the nudeus of an atom. It weighs much less than a proton. 2 Element X, 1x, forms a compound with element Y, 19Y. Which statement describes the bonding in the compound formed? A X and Y share electrons. B X gives away one electron to Y. Y gives away one electron to X. D Y gives away two electrons to X. 3 The table shows the numbers of atoms present in the formula of some compounds. Which row is not correct? numbers of atoms formula A 1 x calcium, 1 x carbon, 3 x oxygen CACO, 1 x carbon, 5 x hydrogen, 1 x oxygen C2H5OH C 1 x hydrogen, 1x oxygen, 1 x sodium NaOH 2 x hydrogen, 4 x oxygen, 1 x sulfur H2SO4 4. An element, X, can be represented as X. Which statement is correct? The number of protons in an atom of X is a. B The exact position of X in the Periodic…

Iron Boron jogius Sulfur Silicon Element (DULCORE) Aluminum Atomic Notation 342 54 Fe sayn JOA 134 VIOBIC Subatomic Metal, Non-metal, Particles or Semi-metal #p #e #n #p #e #n 6 #p #e #n 18 #p #e #n 14 #p #e #n 2aparoun 15491-1407-16 Phase @ 1 atm & 25°C 200g Observations 211AGLA 22 23/2014