How many neutrons does the isotope of lithium have?

• 8
• 3
• 4
• 5

Tags

NGSS.MS-PS1-1

In the following pair, are they isotopes or different elements.

Element x has 6 protons and 7 neutrons.

Element y has 7 protons and 7 neutrons.

• isotopes of same element

• different elements

How many neutrons in Carbon-14?

• 6
• 7
• 14
• 8

In the following pair, are they isotopes or different elements.

Element x has 27 protons and 82 neutrons.

Element y has 27 protons and 83 neutrons.

• isotopes of same element

• different elements

Most of the mass in an atom is made up of _____________________?

• protons and electrons
• protons and neutrons
• neutrons and electrons
• electrons and quarks

Tags

NGSS.MS-PS1-1

In the following pair, are they isotopes or different elements.

Element x has 17 protons and 18 neutrons.

Element y has 18 protons and 17 neutrons.

• isotopes of same element

• different elements

In the following pair, are they isotopes or different elements.

Element x has 56 protons and 81 neutrons.

Element y has 56 protons and 82 neutrons.

• isotopes of same element

• different elements

In the following pair, are they isotopes or different elements.

Element x has an atomic number of 20 and a mass number of 40.

Element y has an atomic number of 20 and a mass number of 41.

• isotopes of same element

• different elements

In the following pair, are they isotopes or different elements.

Element x has an atomic number of 92 and a mass number of 238.

Element y has 92 protons and 143 neutrons.

• isotopes of same element

• different elements

What is the element: Its atomic mass is 56 and has 36 neutrons.

• iron

• Ca

• Cl

• Mn