The Atoms
periodic table
Mass
Force & Motion
acid & base
100
What is an atom? What are atoms made of?
Atoms are the basic building blocks of ordinary matter. Atoms can join together to form molecules, which in turn form most of the objects around you.
100
Mendeleev’s periodic table was organized by increasing _________ __________.
atomic mass
100
What is gas ?
State of matter?in which particles are spread very far apart .
100
when an object changes it's position, it is in _______ ?
motion
100
If calcium hydroxide completely dissociates into positive and negative ions in water, then it is a _________.
strong base
200
All matter is composed of tiny particles that cannot be directly observed called ___________, which scientists study using ___________.
Atoms are studied using models
200
The modern periodic table is organized according to increasing __________ __________.
Atomic number
200
what is plasma ?
The state of matter ?found in the stars .
200
How fast an object moves is it's ?
speed
200
A solution with a pH of 4 is how many times more acidic than a solution with a pH of 7?
1000
300
Which particle of an atom has a negative charge?
Electron
300
What’s the difference between groups and periods on the periodic table?
Groups are the vertical columns while periods are the horizontal rows.
300
what is a solid?
State of matter in which particles are tightly packed together .
300
measuring distance tells you how far an object has ?
moved
300
Which solution is more concentrated, 10.3 M NaOH or 7.5 M HCl?
10.3 M NaOH
400
Which part of an atom has no charge? Which particle has a positive charge?
Neutron = neutral/no charge Proton = positive charge
400
What is the name of the element found in Group 17, Period 3? Also, what is its atomic number, chemical symbol, and average atomic mass?
Chlorine, 17 (atomic #), Cl (symbol), and 35.45 atomic mass units
400
what is liquid ?
State of matter which has a definite volume but not a definite shape .
400
scientist measure weight in ?
newtons
400
Calcium hydroxide feels _________ and has a _____ concentration of H+ ions.
slippery/low
500
The center part of an atom that contains 2 of the 3 subatomic particles is called the atom’s __________.
Nucleus
500
What piece of information on the periodic table determines the identity of any atom? What does this bit of information tell you about the atoms of that element?
Atomic number- tells you the number of protons in the nucleus of the atom of any element
500
What is ?the Periodic Table ?
The elements are ?displayed in a chart
500
things fall to earth because they are pulled by earth's ___
gravity
500
A/an ___ solution is one that is holding it's maximum amount of solute at that tempature
salt
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