Unit 1 Chemistry

The element Tellurium has the atomic mass of 127.60 and its atomic number is 52. How many neutrons are in the element Tellurium?

• 179.60
• 127.60
• 52
• 76

The inner energy level can only hold ______ electrons.

• 1
• 0
• 2
• 18

The largest amount of electrons the 3rd energy level can hold is?

• 18
• unlimited amount
• 2
• 8

^{_{Is the Bohr Model for the element Selenium (Se) correct?}}

• yes
• no

Tags

NGSS.MS-PS1-1

Which particle does not contribute mass to the atom?

• Proton
• Neutron
• Electron
• Nucleus

Which particle contributes the negative charge to the atom?

• proton
• electron
• neutron
• nucleus

Tags

NGSS.MS-PS1-1

Water is an element?

• true
• false

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

The central region of an atom where its neutrons and protons are is its 

• nucleus 
• electron cloud
• core 
• center 

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NGSS.MS-PS1-1

An atom with atomic number 6 would have how many protons 

• 6
• 12
• 3
• cannot be determined 

Tags

NGSS.MS-PS1-1