Science Multiple Choice Finale

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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


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