An atom is electrically neutral because the

number of protons equals the number of electrons

number of protons equals the number of neutrons

number of neutrons are greater than protons plus electrons

ratio of the number of neutrons to the number of electrons is 1:1

A neutral atom is best described as having

an equal number of protons and electrons.

an equal number of protons and neutrons.

Which list describes the particles that make up an atom?

protons, neutron, and electrons

ionic bonds, covalent bonds, and ions

nucleus, electron cloud, and energy levels

An atom of tin has an atomic number of 50 and a mass number of 119. How many protons, electrons, and neutrons are found in one neutral atom of tin?

50 protons, 50 electrons, 69 neutrons

50 protons, 69 electrons, 50 neutrons

69 protons, 50 electrons, 69 neutrons

69 protons, 69 electrons, 50 neutrons

How is the mass of an atom calculated?

add the number of protons to the number of neutrons

add the number of protons to the number of electrons

subtract the number of protons from the number of neutrons

subtract the number of electrons from the sum of protons and neutrons

The atoms in a column of the periodic table all have

The same number of electrons in the outer energy level

The same number of energy levels

The atomic number of nitrogen is 7. 01. The atomic mass is 14. This means that

A small percentage of nitrogen atoms have more than 7 neutrons

All nitrogen atoms have exactly 7 neutrons.

A small percentage of nitrogen atoms have fewer than 7 neutrons

Some nitrogen atoms have fewer than 7 electrons

The atoms of the same element can have different isotopes. An isotope of an atom

Is an atom with a different number of neutrons

Is an atom with a different number of protons

Is an atom with a different number of electrons

Cobalt has an atomic mass of 59 and an atomic number of 27. What does this information reveal about most cobalt atoms?

They contain more neutron than protons

They naturally have a net negative charge

They attract protons more strongly than electrons

They form ions with a charge of +27 in compounds

Elements are identified by their atomic number because

the number of protons remains constant.

the mass of an element changes over time.

atoms of the same element have different numbers of neutrons.

elements in a group react in a similar way.

In a Lewis dot diagram, the electrons shown

Are in the outermost energy level

Are in the innermost energy level

Always equal the number of protons

Always add up to an even number

Nitrogen has one more valence electron than carbon has. What can you infer about nitrogen’s location on the periodic table?

Nitrogen and carbon are in different groups.

A Nitrogen is in the first group.

Nitrogen is directly above carbon but within the same group.

Nitrogen is directly below carbon but within the same group.

The image shown is that the Bohr model for a neutral of atom chlorine. What details from this image supports this statement?

The number of electrons is equal to protons.

There are 17 protons in the nucleus.

Atoms and Its Structures

Authored by Tholeathcus Raiford

Chemistry

8th - 10th Grade

Used 36+ times

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40 questions

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MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which phrase describes an atom?

a positively charged electron cloud surrounding a positively charged nucleus

a positively charged electron cloud surrounding a negatively charged nucleus

a negatively charged electron cloud surrounding a positively charged nucleus

a negatively charged electron cloud surrounding a negatively charged nucleus

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which statement concerning elements is true?

Different elements must have different numbers of isotopes.

Different elements must have different numbers of neutrons.

All atoms of a given element must have the same atomic number.

All atoms of a given element must have the same mass number.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If the atomic mass number of an atom is 35, which statement is most accurate?

The atom is not an isotope.

The atomic number is less than 17.

The atom has an odd number of neutrons.

The number of protons does not equal the number of neutrons.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many protons does an atom with an atomic number of 23 and a mass number of 51 have?

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which of the following determines the identity of an element?

overall charge

atomic mass

mass number

atomic number

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Isotopes exist because atoms of the same element can have different numbers of

protons.

electrons.

neutrons.

None of the options apply.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which total mass is the smallest?

the mass of 2 electrons

the mass of 2 neutrons

the mass of 1 electron plus the mass of 1 proton

the mass of 1 neutron plus the mass of 1 electron

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Atoms and Its Structures

Which phrase describes an atom?

Which statement concerning elements is true?

If the atomic mass number of an atom is 35, which statement is most accurate?

How many protons does an atom with an atomic number of 23 and a mass number of 51 have?

Which of the following determines the identity of an element?

Isotopes exist because atoms of the same element can have different numbers of

Which total mass is the smallest?

An atom is electrically neutral because the

A particle of an atom contains 26 protons, 23 electrons, and 56 neutrons. What will be the correct atomic number for this particle?

Which element could have a mass number of 86 atomic mass units and 49 neutrons in its nucleus?

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