S8P1E

The small, dense, positively charged center of an atom

• Neutron

• Proton

• Nucleus

• Electron

What is the mass number of this atom? (THINK: What two parts have a MASS?)

• 1

• 3

• 4

• 7

Tags

NGSS.MS-PS1-1

Explain why elements in the same group of the periodic table have similar chemical properties.

• They have the same number of protons.

• They have the same number of valence electrons.

• They have the same atomic mass.

• They have the same number of neutrons.

Which subatomic particle is found in the nucleus of an atom along with protons?

• Electrons

• Neutrons

• Positrons

• Photons

Tags

NGSS.MS-PS1-1

How does the atomic number of an element determine its position in the periodic table?

• It determines the element's group.

• It determines the element's period.

• It determines the element's block.

• It determines the element's row.

Olivia is learning about elements in her science class. She wants to know the relationship between the number of protons and the identity of an element.

• The number of protons determines the element's mass.

• The number of protons determines the element's charge.

• The number of protons determines the element's identity.

• The number of protons determines the element's volume.

How do the properties of metals and nonmetals differ based on their position in the periodic table?

• Metals are found on the right side, nonmetals on the left.

• Metals are found in the center, and nonmetals on the edges.

• Metals are found on the left side, and nonmetals on the right.

• Metals and nonmetals are randomly distributed.

Evaluate the trend of electronegativity across a period in the periodic table.

• Electronegativity decreases across a period.

• Electronegativity increases across a period.

• Electronegativity remains constant across a period.

• Electronegativity fluctuates randomly across a period.

What is the role of neutrons in the nucleus of an atom?

• They determine the chemical properties of the atom.

• They stabilize the nucleus by offsetting the repulsive forces between protons.

• They determine the charge of the atom.

• They determine the atomic number of the atom.

What is the charge of a proton?

• Negative

• Positive

• Neutral

• Variable