Semester 2 Review

What is the isotope symbol for an atom with 52 protons and 63 neutrons?

• Te-115

• Te-52

• I-115

• I-52

What is the isotope symbol for an atom of Au-201?

• Au-201

• Ag-201

• Au-79

• Ag-79

What is the mass number of an atom that contains 19 protons, 19 electrons, and 20 neutrons?

• 19

• 20

• 39

• 58

The nucleus of an atom consists of 8 protons and 6 neutrons. The total number of electrons present in a neutral atom of this element is:

• 6

• 8

• 14

• 16

Tags

NGSS.MS-PS1-1

These isotopes of oxygen, 16O, 17O, and 18O have the same number of protons, but a different number of:

• electrons

• protons

• neutrons

• atomic numbers

All atoms of an element have the same:

• mass number

• atomic number

• number of neutrons

• number of electrons

The atomic number is always equal to the total number of

• neutrons in the nucleus

• protons in the nucleus

• neutrons plus protons in the atom

• protons plus electrons in the atom

How many protons are in the nucleus of an atom of beryllium?

• 4

• 5

• 6

• 11

Which subatomic particle is negative?

• proton

• neutron

• electron

• nucleus

Which of the following particles has the least mass?

• neutron

• proton

• electron

• alpha particle