Sapling Homework #4
have a relative charge of +1
protons
located in the nucleus of an atom
protons, neutrons
fish with density of 1.03g/cm(3) in sea water with density of 1.03/cm(3)
it will neither sink or float
have no charge
neutrons
isotopes are atoms of a particular element that contain a different number of
neutrons
What is the charge on a hypothetical ion with 55 protons and 52 electrons?
+3
atomic number 20
Ca
atomic number 19
K
lithium oxide formula
Li(2)O
magnesium chloride formula
MgCl(2)
atomic number 10
Ne
atomic number 51
Sb
silver with density of 10.5g/cm(3) in honey with density of .36g/cm(3)
will sink
have a much lower mass than the other two types of particles
electrons
have a relative charge of -1
electrons
As you pull a spring out of its equilibrium configuration, it will pull back on you with less and less force as it gets larger and larger
false
As you squeeze a spring out of its equilibrium configuration, it will push back on you with less and less force as it gets smaller and smaller
false
The nucleus of an atom is neutral
false
the nucleus accounts for almost all the volume of an atom
false
the nucleus can be positively or negatively charged depending on the identity of the atom
false
the nucleus of an atom contains only neutrons
false
the number of nucleons present in the nucleus is equal to the number of electrons present outside the nucleus
false
cobalt
symbol: Co atomic number: 27 mass number: 59 number of protons: 27 number of electrons: 27 number of neutrons: 32
potassium
symbol: K atomic number: 19 mass number: 39 number of protons:19 number of electrons:19 number of neutrons:20
phosphorous
symbol: P atomic number: 15 mass number: 31 number of protons:15 number of electrons:15 number of neutrons:16
A toy floats in a swimming pool. The buoyant force exerted on the toy depends on the volume of
the toy under water
As you pull a spring out of its equilibrium configuration, it will pull back on you with more and more force as it gets larger and larger
true
As you squeeze a spring out of its equilibrium configuration, it will push back on you with more and more force as it gets smaller and smaller
true
the nucleus accounts for almost all the mass of an atom
true
Which of the following are examples of matter?
water, air
balsa wood with density of .12g/cm(3) in sea water with density of 1.03g/cm(3)
will float
silver with density of 10.5g/cm(3) in mercury with density of 13.6gm/cm(3)
will float
lead with density of 11.3gm/cm(3) in benzene with density of .90gm/cm(3)
will sink
