1) In the equation 2 H2 + O2 → 2 H2O,A) H2, O2, and also H2O room all compounds.B) H2, O2, and also H2O space all elements.C) only H2O is a compound.D) just H2 and O2 space compounds.

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2) What is the atomic mass of an atom that has actually 6 protons, 6 neutrons, and also 6 electrons?A) 6B) 8C) 12D) 18
3) an uncharged atom of boron has an atomic variety of 5 and an atomic mass that 11. How numerous electrons does boron have?A) 11B) 15C) 5D) 2
4) Typically, nitrogen atoms room composed of electrons, protons, and also neutrons. An isotope that nitrogen couldA) be positively charged.B) be negative charged.C) have an ext protons than the usual nitrogen atom.D) have much more neutrons 보다 the usual nitrogen atom.
When full, the innermost electron shell of argon consists of ________ electrons, and also the outermost shell has ________ electrons.A) 2; 2B) 2; 8C) 4; 8D) 8; 8
What happens to one atom if the electrons in the outer shell are altered?A) The atom becomes radioactive.B) The atom disintegrates.C) The nature of the atom change.D) The atom"s attributes change, and also it becomes a various element.
A(n) ________ creates when two atoms share electrons.A) ionB) covalent bondC) ionic bondD) hydrogen bond
A hydrogen atom has actually one electron. How numerous covalent bonds deserve to hydrogen form?A) oneB) twoC) fourD) none
Table salt is formed whenA) chlorine gives an electron to sodium.B) a hydrogen link forms between sodium and chlorine.C) sodium and also chlorine share electron to form a bond.D) salt donates its solitary outer electron to chlorine.
10) What is the basic difference between covalent and ionic bonding?A) In a covalent bond, the partners share a pair the electrons; in one ionic bond, one companion accepts electrons from the other.B) In covalent bonding, both partners end up with filled outer electron shells; in ionic bonding, one companion does and the other does not.C) Covalent bonding involves only the outermost electron shell; ionic bonding additionally involves the next electron shell inside the outermost shell.D) Covalent bonds type between atom of the same element; ionic bonds kind between atoms of various elements.
Which that the complying with statements about the oxygen atom of a water molecule is true?A) Oxygen is more positively charged 보다 the hydrogen atoms.B) Oxygen attracts electrons much less strongly than the hydrogen atoms.C) Oxygen is much more electronegative than the hydrogen atoms.D) Oxygen is attracted to the negative charged atom of other molecules.
In a water molecule, hydrogen and oxygen are hosted together by a ________ bond.A) dual covalentB) nonpolar covalentC) hydrogenD) polar covalent
A solitary water molecule (H—O—H) is held together byA) a single covalent bond.B) a twin covalent bond.C) two polar covalent bonds.D) hydrogen bonds.

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The hydrogen atom of a water molecule space bonded to the oxygen atom through ________ bonds, whereas surrounding water molecules are organized together by ________ bonds.A) hydrogen; polar covalentB) polar covalent; hydrogenC) ionic; covalentD) polar covalent; ionic
Which that the adhering to statements best describes a compound?A) A link is a pure element.B) A compound includes two or much more different facets in a resolved ratio.C) A link is exemplified by sodium.D) A link is a solution.

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