8.5A&B Review

How would you describe the nucleus of an atom?

• dense, positively charged

• large, positively charged

• tiny, negatively charged

• dense, negatively charged

At the atomic level, what makes elements reactive?

• having a filled outer level

• exchanging or sharing valence electrons

• having the same number of electrons

• having the same number of protons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

An atom has 12 protons, 14 neutrons, and 12 electrons. What is the atomic number of this element?

• 24

• 26

• 12

• 38

Tags

NGSS.MS-PS1-1

An atom of which element has 37 protons, 48 neutrons and 1 valence electron?

• Neon (Ne)

• Carbon (C)

• Rubidium (Rb)

• Sodium (Na)

Tags

NGSS.MS-PS1-1

An atom of which element is represented by this model?

• Neon (Ne)

• Boron (B)

• Nitrogen (N)

• Carbon (C)

Tags

NGSS.MS-PS1-1

What part of the atom determines the identity of an atom?

• Electrons

• Neutrons

• Protons

• Nucleus

What part of the atom determines the chemical properties or reactivity?

• Protons

• Electrons

• Valence Electrons

• Energy levels

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

A chemist is identifying the elements present in a sample of seawater. What characteristic of an element's atoms always determines the element's identity?

• The number of electrons

• The number of neutrons

• The number of protons

• The number of valence electrons

An atom of which element is represented by this model?

• Carbon (C)

• Neon (Ne)

• Sodium (Na)

• Boron (B)

Tags

NGSS.MS-PS1-1

An atom has 11 protons, 12 neutrons, and 11 electrons. What is the identity of the element?

• Sodium

• Titanium

• Vanadium

• Magnesium

Tags

NGSS.MS-PS1-1