Unit 2 Exam

What group is calcium in?

• Group 1

• Group 2

• Group 4

• Group 18

What element is found in group 6, period 5?

• Molybdenum

• Tantalum

• Niobium

• Carbon

Where are the protons in an atom located?

• In the electron cloud

• On the outside of the atom

• In the nucleus

• With the electrons

How many neutrons are found in a lithium atom with a mass of 7?

• 3 neutrons

• 7 neutrons

• 4 neutrons

• 10 neutrons

What is the atomic number of copper?

• 6

• 29

• 55

• 17

How many electrons does a neutral atom of magnesium have?

• 24 electrons

• 12 electrons

• 3 electrons

• 25 electrons

Tags

NGSS.MS-PS1-1

What subatomic particles make up the majority of the mass of an atom?

• The neutrons and electrons

• The protons and electrons

• Just the protons

• The protons and the neutrons

What is the best description of an isotope?

• Atoms of the same element that have different numbers of protons

• Atoms of the same element that have different numbers of neutrons.

• Atoms of different elements that have the same number of protons

• Atoms of different elements that have the same mass as one another

Atom A has 7 protons and 7 neutrons. Atom B has 6 protons and 7 neutrons. Are these two atoms isotopes of one another?

• Yes, they have the same number of neutrons.

• Yes, they have different numbers of protons.

• No, they have different numbers of protons and are therefore different elements.

• No, they have the different masses and cannot be isotopes.

What is the correct hyphen notation for an beryllium atom with 6 neutrons?

• Beryllium-6

• Beryllium-4

• Beryllium-10

• Beryllium-1

Tags

NGSS.HS-PS1-8