ATI TEAS 7 ENGLISH AND LANGUAGE USAGE QUESTIONS AND ANSWERS
heating curve of water A graph of temperature versus heat showing the states of matter for water - During Melting Vaporization occurs and sublimation phase changes - Particles are absorbing energy During these phase changes: Cohesion...
11/3/23, 8:17 PM ATI TEAS 7 Chemistry Questions and answers 2022
ATI TEAS 7 Chemistry Questions and answers 2022
Matter
Anything that has mass + volume
divisions of matter
pure substances and mixtures
Pure Substance
A sample of matter, either a single element or a single compound, that has definite chemical and
physical properties
EX: O, H, CL, ( elements )
Compounds: H20, NaCL
definite properties: always the same
Heterogenous mixtures are...
mixtures that are not uniform throughout
Oil and water
- creating a distinct boundary
Homogenous mixture example
a mixture in which the composition is uniform throughout
salt water
Is blood homogeneous or heterogeneous?
blood under microscope is heterogenous
regular blood is homogenous
Mass
A measure / quantity of the amount of matter in an object
Volume
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The amount of space an object takes up
weight
measurement of the gravitational pull on a object
- greater the gravitational pull on a object the more it will weigh
will the weight of a space ship change
yes
will the mass of a spaceship change
no
Sub-atomic particles
protons, neutrons, electrons
Protons
Positively charged particles
Neutrons
the particles of the nucleus that have no charge
Electrons
Negatively charged particles
Atoms
smallest unit of matter
What is the center of an atom?
protons and neutrons
Where are electrons located?
orbitals
outside the nucleus
Elements
any substance that cannot be broken down into simpler substances
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- only the specfic atoms can create the element
ex: Element Iron only has Iron atoms
Diatomic elements are
H2, N2, O2, F2, Cl2, Br2, I2
these have only have two atoms in PAIRS
All diatomic molecules have
Non Polar covalent bonds between the same atoms
Molecules
two or more atoms joined together
Diatomic elements are Molecules
Any other atoms jointed are molecules
ex: H2O, CH4, H2, N2
What is a compound?
2 or more elements chemically combined
all compounds are molecules
Forms of matter
solid, liquid, gas
Protons are referred as
In chemistry, the term proton refers to the hydrogen ion, H+
Solid
fixed shape and volume
- Molecules are packed together in a tight, orderly pattern
- Vibrational motion, not translational motion
- Retains shape
- Retains density
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