Campbell Biology in focus, 3rd edition Test Exam Bank Chapter 002 Complete Solution 2023 Verified
evaluate the following statement. oxygen is not a greenhouse gas therefore gases containing oxygen such as carbon dioxide are not greenhouse gases either correct answers false. compounds can have em...
Campbell Biology in focus, 3rd edition Test Exam Bank
Chapter 002 Complete Solution 2023 Verified
evaluate the following statement. oxygen is not a greenhouse gas therefore gases containing oxygen
such as carbon dioxide are not greenhouse gases either correct answers false. compounds can have
emergent properties that are very different from the elements that form them
there are ___ naturally occurring elements correct answers 92
what is a trace element correct answers copper
what are the four most abundant elements found in living organisms correct answers hydrogen. oxygen.
nitrogen. and carbon
adding proton number and neutron number what would be the result correct answers atomic mass
number
which subatomic particles electrically neutral correct answers neutrons
the number of protons in an unchanged atom ____. correct answers equals the number of electrons
consider a hypothetical atom with an atomic number of four and an atomic mass of nine how many
neutrons does the atom have? correct answers 5
an uncharged atom of nitrogen (atomic number=7) has ___. correct answers seven protons and seven
electrons
isotopes of an element will always differ in___. correct answers atomic mass
a particular carbon isotope has an atomic number of 6 and an atomic mass of 14. the respective number
of neutrons protons and electrons in an electrically neutral atom if this isotope carbon is ____ correct
answers 8, 6 and 6
Phosphorus-32 (radioactive) has _____ than phosphorus-35 (normal). correct answers three fewer
neutrons
the most common form of calcium has 20 protons, 20 neutrons, and 20 electrons. which of the following
elements would be an isotope of calcium correct answers and Adam with 20 protons 21 neutrons and 20
electrons
radioactive isotopes are useful in scientific research because ____. correct answers they can be used as
tracers to follow particular atoms and molecules through metabolic pathways especially in medicine
potassium (atomic number 19, mass number 40) and sodium (atomic number 11 mass number 23) have
similar chemical properties and reactive behavior. this is because uncharged atoms of potassium and
, sodium_____ correct answers have different Mass numbers and each has one electron and its
outermost electron shell.
the chemical characteristics or reactivity of an element depend mostly on the correct answers number
of electrons in its outermost shell
some groups of elements react chemically in similar ways. for example, the chemistry of sodium and the
chemistry of lithium are similar. the chemistry of chlorine and the chemistry of iodine are also similar.
these similarities and chemistry result when different elements have similar____ correct answers
numbers of outer shell electrons
how many electrons would be present in the valence shell of a sulfur atom, atomic number 16 mass
number 32 correct answers 6 electrons
for most adams, a stable configuration of electrons is attained when the atom____ correct answers has
a full number electrons in its outermost shell
and atom that normally has ___ in its outer shell would not tend to form chemical bonds with other
atoms correct answers 8 electrons
when one or more pairs of valence electrons are shared by two neutral atoms what type of bond is
formed correct answers a covalent bond
a polar covalent bond is a bond that_____ correct answers the electrons of the bond are not shared
equally
a covalent bond is likely to be polar if____ correct answers one of the atom sharing electrons is much
more electronegative
when two atoms are so unequal in their attraction for valence electrons that the more electronegative
atom strips in electron completely away from its partner the two resulting oppositely charged atoms, or
molecules____ correct answers are ions
sodium atom has a mass number of 23 it's atomic number is 11. how many electrons does it have if it is
not an ion. correct answers 11
copper has an atomic number of 29 and a mass number of 64. what would result if an uncharged copper
atom lost two electrons correct answers the atomic number would remain 29. the mass number would
remain 64. and the atom would be a cation with a plus two charge
the compound CaSO4 ionizes into a calcium ion and a sulfate ion (SO4) CALCIUM HAS TWO ELECTRONS
IN ITS OUTER SHELL. upon ionization what would you expect the charge of the sulfate ion to be correct
answers -2
ionic bonds form as a result of___ correct answers attraction between ions that have opposite charges
a hydrogen bond ____ correct answers is a weak chemical bond
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