3.9c

How many electrons does this oxygen atom have?

• 16

• 8

• 24

• 6

Tags

NGSS.MS-PS1-1

which atom has  4 neutrons?

• Li-6

• Li-7

• Li-8

• they have the same # of neutrons

Tags

NGSS.MS-PS1-1

An atom with atomic number 6 would have how many protons 

• 6

• 12

• 3

• cannot be determined 

How many electrons can be in the 2nd energy level hold?

• 1

• 2

• 4

• 8

If both protons and neutrons are found in the nucleus, why is it positive?

• The reason it is positive is because neutrons have a positive charge and protons have a negative charge.

• The reason it is positive is because neutrons have a negative charge and protons have a positive charge

• The reason it is positive is because neutrons have no charge and protons have a positive charge.

• The reason it is positive is because neutrons have no charge and protons have a negative charge

The part of the salt that caused the colour in the flame test was

• chloride

• the metal

• the gas

How many protons does this isotope of titanium have?

• 48

• 22

• 26

• 70

Tags

NGSS.MS-PS1-1

Isotopes of the same element have the same number of 

• protons

• neutrons

• electrons

• not enough information

What is the atomic number of an element with 3 protons?

• 1

• 2

• 3

• 4

Which of the following elements has an atomic number of 8?

• Carbon

• Oxygen

• Nitrogen

• Helium