Science Multiple Choice Finale
Barium ions carry a 2+ charge and nitrogen ions carry a 3- charge what would be the chemical formula for the ionic compound barium nitride
Ba3N2
I you mix a typical iodine ion)I atomic no. 53) with a typical barium ion (Ba atomic no. 56) what compound is formed
BaI2
When an alpha particle is ejected from a nucleus the nucleus then has less
Both mass and charge
The weight of matter comes mostly from
Both protons and neutrons
substances are composed of tiny particles. Temperature is related mostly to the particles'
average kinetic energy
Microscopic ice slush in a glass of water tends to make the entire slush-water
less dense
metals are both good heat and electrical conductors due to
looseness of outer electrons in metal atoms
a substance that heats up relatively quickly has a
low specific heat
the fact that desert sand is very hot in the day and very cold at night is evidence that sand has a
low specific heat
whether one object is warmer than another object has most to do with
molecular kinetic energy
a good heat conductor is a
poor insulator
a substance absorbs heat energy by the process of
radiation,conduction, and convection
which of the following normally warms up slower when heat is applied? water, iron,glass, or wood
water: high specific heat
the decision to wear dark clothing during winter months is wise because
dark colors absorb heat
As a hot iron cools, the diameter of the hole
decreases
your toes feel warmer on the rug then on a tile floor because the rug
is a better insulator than tile
What makes an element distinct
The number of protons
during a cold winter, water pipes sometimes burst because
water expands when freezing
If a neutral atom loses one electron what is the electrical charge of the atom
+1
the lowest temperature possible in nature is
-273 degrees Celsius
Compared to the mass of hydrogen atom, the mass of an oxygen atom is
16 times greater
How many oxide ions (0-2) are needed to valence the positive charge of titanium (Ti+4
2
How many valence electrons does Boron atomic number 5 have
3
When radium (A=88) emits an alpha particle, the resulting nucleus has an atomic number
86
An element will decay to an element with higher atomic number in the periodic table if it emits
A beta particle
Which is the sest particle listed
A quark
Which is the smallesest particle listed( a molecule, an atom, a neutron, a proton, and a quark)
A quark
What needs to be done to convert a neutral nitrogen atom into N-3
Add three electrons
I you mix a typical aluminum ion)I atomic no. 13) with a typical oxygen ion (Ba atomic no.8) what compound is formed
Al2O3
Which of the following would be a negative ion with a single charge
An atom with 11 protons and 12 electrons
Most alpha particles fired at a gold foil pass through un deflected because the
Atoms of gold,like any mostly empty space
Which of the following substances contains F- ions
CaF2
If two protons are removed from an oxygen nucleus, the result is
Carbon
Whic of the following isotopes is radioactive
Carbon-14
on which temperature scale in 0 degrees the freezing point of water
Celsius
When a nucleus emits a beta particle, it's atomic number
Changes,but it's mass number remains constant
What is it that electrons have that protons always have in equal magnitude
Charge
When a beta particle is ejected from the nucleus the nucleus then has a greater
Charge
when bimetallic bar composed of copper an iron strips is heated, the bar bends toward the iron strip because
Copper extends more then iron
Carbon-14 is produced in the atmosphere princiblly by
Cosmic ray bombardment
Which of the following is not a property of metal
Does not conduct heat well
The volume of matter comes mostly from
Electrons
Which radiation has no change in electric charge of the nucleus ass Otis red with it
Gamma rays
Which of the following compounds has polar covalent bonds
H2O
A hydrogen atom does not form more than one covalent bond because
Has only one electron to share
When the hydrogen isotope tritium-3 emits a beta particle it becomes an isotope of
Helium
Many of the marcroscopic properties of a compound depend on
How the atoms and molecules are held together
The concept of a chemical bond is
How two or more atoms are held together
Generally speaking, the larger the nucleus the greater it's
Instability
Uranium-235 uranium-238 and nitrogen-239 are different
Isotopes
Which has the greatest number of protons in its nucleus
Lead(atomic number)
Which has the greatest number of protons in its nucleus(gold, mercury, lead, silver)
Lead(atomic number)
Which of the following elements has two valence electrons
Mg
Which of the following elements will most likely form an ion with a +2 charge
Mg
Which of the following moluclus contains an ionic bond
MgCl2
When a gamma ray is emitted by a nucleus the nucleus then has appreciably less
Neither mass or charge
Which of the following is electrically netral
Neutron
Which of the following is electrically neutral(proton, neutron, electron, all of these)
Neutron
Different isotopes of the same elements have different numbers of
Neutrons
There is a greater proportion of carbon-14 in
New bones
Is it all possible for a hydrogen nucleus to emit an alpha particle
No because it does have the required particles
When thorium (A=90) emits a beta particle the resulting nucleus has an atomic number
None of the above (88,89,90,92)
The process of making helium from hydrogen is an example of
Nuclear fusion
The atomic number of an element is the same as the number of its
Nucleons
Elements in the periodic table are listed in order of atomic
Number
Which of the following is NOT an ion
O2
Which of the following best describes ionic bonding
One atom giving up some of its electrons to antotjer atom
The half-life of an isotope is one day. At the end of two days the amount that remains
One-quarter
In an electrically neutral atom, the number of protons in the nucleus is balnenced by an equal number of
Orbitial electrons
The atomic number of an element is the same number as the number of its
Protons
The source of earth natural heat is
Radioactive decay in earths core
Which of the following elements will most likely form an ion with a -2 charge
S
One reason the atomic masses listed in the periodic table are not whole numbers is that
The atomic masses are averaged over different isotopes
Most of the radioactivity we personally encounter comes from
The natural environment
In terms of the periodic table is there an abrupt or gradual change between ionic and covelent bonds
There is a gradual change the further apart the more ionic
Which are older, the atom in the body of an elderly person or those in the body of a baby
They are the same age, which is older then the solar system
Atoms of matallic elements can form ionic bonds but they are not very good at forming convalent bonds. Why?
They have a great tendency to lose electrons
The Bohr model is similar
To a miniature solar system
How many different elements are in a water molecule(h20)
Two
Which of these atoms has the greatest number of electrons when neutral
Uranium
Which of these atoms has the greatest number of electrons when neutral(helium, carbon, iron, gold, uranium)
Uranium
Which of these atoms has the most mass
Uranium
Which of these atoms has the most mass( hydrogen, iron, lead, uranium)
Uranium
pour a liter of 40 degree C water into a liter of 20 degree C water and the final temperature of the two liters become
at or about 30
heat energy is measured in units of
both joules and calories
transfer of heat among air and water molecules causing weather patterns happens by
convection
when you touch a piece of ice with your finger, energy flows
from your finger to the ice
The moderate temperatures of islands throughout the world has mainly to do with the water's
high specific heat capacity
the white-hot sparks from fireworks sparkler that strike your skin don't cause injury because
the energy per molecule is high, but the total energy transferred is small
a measure of total energy of particles in a substance is
thermal energy
if the same quantity of heat is added to both a full 1 liter and a full 2- liter container of water, the temperature change of water in the 1-liter container will be
twice