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Isotopes of an element must have different what?
1. atomic numbers
2. numbers of protons
3. numbers of electrons
4. mass numbers
Numbers that indicate position or order: first, second, third.
1. real numbers
2. primary numbers
3. ordinal numbers
4. irrational numbers
Grade 8 Periodic Table and Elements
The number of protons in an atom is equal to the
1. group number.
2. period number.
3. number of neutrons.
4. atomic number.
Grade 4 Primes, Factors, and Multiples CCSS: 4.OA.B.4
Grade 2 Food (Stories) CCSS: CCRA.R.5, RI.2.5

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What do the numbers most likely represent?
1. Number of recipes
2. Number of words
3. Page numbers
4. Recipe numbers
Grade 8 Rational and Irrational Numbers CCSS: 8.NS.A.1
Non-terminating, non-repeating decimals are classified as                   .
1. Irrational Numbers
2. Natural Numbers
3. Rational Numbers
4. Whole Numbers
Grade 10 Periodic Table and Elements
What determines the length of each period?
1. The number of electrons
2. The number of elements
3. The number of neutrons
4. The number of orbitals
Grade 7 Represent and Determine Probability CCSS: 7.SP.C.7, 7.SP.C.7a
What do you use to convert from moles to atoms and atoms to mole?
3. Lui's number
4. Segall's number
How does an $S^(2-)$ ion differ from an electrically neutral sulfur atom?
1. mass number
2. atomic number
3. proton number
4. number of electrons
For given matrices A and B, let $A \ B = M$, where M is a also a matrix. Which of the following correctly describes the dimensions of matrix M?
1. Number of rows of A, number of columns of B.
2. Number of rows of B, number of columns of A.
3. Number of rows of A, number of columns of A.
4. Number of rows of B, number of columns of B.
What is diversity?
1. number of species
2. number of habitats
3. number ecosystems
4. number of natural resources
Grade 3 Counting and Comparing Numbers
Grade 9 Quantum Physics and the Atom
What does the mass number of an atom tell you about the atom?
1. number of electrons
2. number of protons
3. number of neutrons
4. number of protons and neutrons
Grade 10 Cell Structure and Function

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The number of chromosomes in a gamete is the
1. haploid number.
2. diploid number.
3. homolog number.
4. meiosis phase number.
Grade 9 Quantum Physics and the Atom
What does the atomic number tell about an atom?
1. the number of protons
2. the number of protons and neutrons
3. the number of electrons
4. the number of neutrons
Grade 11 DNA, RNA, and Genetics
The number of chromosomes in a gamete is the
1. haploid number.
2. diploid number.
3. homolog number.
4. meiosis phase number.
Grade 10 Periodic Table and Elements
Which feature determines the chemical properties of an element?
1. the group number
2. the period number
3. the number of valence electrons
4. the atomic number
Grade 10 Periodic Table and Elements
Which of the following distinguishes an alkaline earth metal from an alkali metal?
1. The atomic number
2. The mass number
3. The number of protons
4. The number of valence electrons
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