ERMS16- 8th grade science: Ch. 5 quiz ATOMS

What are atoms with the same number of protons but different number of neutrons called?

What model states that the nucleus is positive & electrons are in energy levels around it?

What did Democritus call the smallest possible particle?

Fluorine's atomic number is 9 and mass of 19. How many neutrons does it have?

What is NOT in the nucleus of an atom

What model asserted that electrons move in definite orbits like the planets around the sun?

What did JJ Thomson discover?

Oxygen's atomic number is 8 and mass of 16. How many neutrons does it have?

What is the heavy center of the atom?

Fluorine's atomic number is 9 and mass of 19. How many electrons does it have?

What model stated the positive particles were in the nucleus & the negative outside?

What is the unit mass for a proton?

Fluorine's atomic number is 9 and mass of 19. How many protons does it have?

Sodium's atomic number is 11 and mass of 23. How many protons are there?

What are the four forces within an atom?

Which was NOT part of Dalton's model?

Sulfur's atomic number is 16 and mass of 32. How many electrons does it have?

Aluminum's atomic number is 13 and mass of 27. How many neutrons does it have?

According to modern atomic theory, electrons are arranged in what?

The number of protons in the nucleus is called what?

Sodium's atomic number is 11 and mass of 23. How many electrons does it have?

What has a mass of 1/1836 amu?

What are the subatomic particles that make up an atom?

The mass number is equal to the number of protons and electrons?

Aluminum's atomic number is 13 and mass of 27. How many protons does it have?