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ORELA Subtest II Math & Science (NES) UPDATED Actual Exam Questions and CORRECT Answers $9.99   Add to cart

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ORELA Subtest II Math & Science (NES) UPDATED Actual Exam Questions and CORRECT Answers

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ORELA Subtest II Math & Science (NES) UPDATED Actual Exam Questions and CORRECT Answers Atoms - CORRECT ANSWER- central Nucleus surrounded by Electrons. Held by electromagnetic force between these two. Nucleus - CORRECT ANSWER- Protons + neutrons. Positively charged, dense and heavier than...

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  • September 14, 2024
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  • Exam (elaborations)
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  • ORELA Subtest II Math & Science
  • ORELA Subtest II Math & Science
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MGRADES
ORELA Subtest II Math & Science (NES)
UPDATED Actual Exam Questions and
CORRECT Answers
Atoms - CORRECT ANSWER✔✔- central Nucleus surrounded by Electrons. Held by
electromagnetic force between these two.


Nucleus - CORRECT ANSWER✔✔- Protons + neutrons. Positively charged, dense and
heavier than electrons.


Electrons - CORRECT ANSWER✔✔- Negatively charged and orbit the nucleus.



Atoms bond together make - CORRECT ANSWER✔✔- Molecules (2H + 1O = H2O)



Ions - CORRECT ANSWER✔✔- When number of protons and electrons is not equal



Hadrons - CORRECT ANSWER✔✔- Protons and neutrons are made of it



"N" - CORRECT ANSWER✔✔- Representation of the number of Neutrons



"Z" - CORRECT ANSWER✔✔- Representation of the number of Protons (the proton
number or atomic number)


Element - CORRECT ANSWER✔✔- Matter with one type of atom and identified by its
atomic number. 117 elements (94 occur naturally on Earth)


Atomic number - CORRECT ANSWER✔✔- - The number of protons in the nucleus of an
atom
- used to sort elements in the periodic table


Molecular formation - CORRECT ANSWER✔✔-

,Natural Numbers - CORRECT ANSWER✔✔- N = {1, 2, 3, 4, 5, 6, . . . }



Real #s - CORRECT ANSWER✔✔- All #s (rational and irrational), excluding infinity and
any that are imaginary


Rational Numbers - CORRECT ANSWER✔✔- Integers, decimals, fractions



Irrational Numbers - CORRECT ANSWER✔✔- Infinite decimal #s, #s with non-recurring
patterns, ie) 2.999 and Pi (3.14...)


Whole natural numbers together with zero. - CORRECT ANSWER✔✔- W = {0, 1, 2, 3, 4,
5, 6, . . . }


Every whole number has a unique opposite or negative whose sum with it is 0 - CORRECT
ANSWER✔✔- 2 + (-2) = 0



Integers - CORRECT ANSWER✔✔- Are whole #s; All + and - #s including 0; Z = {. . ., -3,
-2, -1, 0, 1, 2, 3, . . . }; they have no fractional part


Prime # - CORRECT ANSWER✔✔- can be divided evenly only by 1, or itself



Commutative property of addition and multiplication - CORRECT ANSWER✔✔- When
adding/multiplying two numbers, the sum is the same regardless of the order in which the
numbers are added.
2+3=3+2
3x4=4x3


Associative property of addition and mulitplication - CORRECT ANSWER✔✔- When
adding three or more numbers, the sum is the same regardless of the way in which the
numbers are grouped.
2 + (3 + 5) = (2 + 3) * 5
3 * (4 x 5) = (3 x 4) * 5

, Identity property - CORRECT ANSWER✔✔- Adding zero to a number does not change it.
2+0=2


Distributive property - CORRECT ANSWER✔✔- Multiplying a sum by a # is the same as
multiplying each addend by the # and then adding the products
2 × (3 + 5) = (2 × 3) + (2 × 5)


Exponentiation - CORRECT ANSWER✔✔- repeated multiplication; is often called a power.
For example, the third power of 2 is
2³ = 2 × 2 × 2 = 8


We define the zero power of any nonzero number to be 1 - CORRECT ANSWER✔✔- (-3)⁰
=1


A negative exponent indicates a reciprocal - CORRECT ANSWER✔✔- 2 −³ = ³ =



The first power of any number is itself - CORRECT ANSWER✔✔- 2¹ = 2



A(n) * A(m) = - CORRECT ANSWER✔✔- add the exponents... A(n+m)



Aⁿ / A(m) = - CORRECT ANSWER✔✔- subtract the exponents...A(n-m)



A(n)m - CORRECT ANSWER✔✔- multiply the exponents...A(n*m)


(AxB)ⁿ=
or

(A/Bⁿ= - CORRECT ANSWER✔✔- Aⁿ * Bⁿ
or
Aⁿ / Bⁿ

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