TEKS 8.5ABC Pre-Test

What can be concluded from the information provided?

• The nucleus contains protons and electrons

• The nucleus contains a positive charge

• The nucleus contains a negative charge

• The nucleus contains neutrons and electrons

Tags

NGSS.MS-PS1-1

An atom has 29 protons, 29 electrons, and 35 electrons. What is the mass number of the atom?

Which atom diagram has chemical properties most similar to carbon?

• 
• 
• 
• 

Tags

NGSS.MS-PS1-1

Potassium (K), atomic number 19, will most likely react with-

• Sodium (Na), because it is in the same column

• Calcium (Ca), because it is in the same row

• Chlorine (Cl), because it is a nonmetal

• Argon (Ar), because it is a noble gas

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-2

Fluorine is a halogen and a nonmetal that is extremely toxic to humans. When combined with other elements it has many uses, including preventing tooth decay. Which information below identifies Fluorine (F)?

• 9 protons

• 9 neutrons

• 19 electrons

• 19 protons

Tags

NGSS.MS-PS1-1

Which of the following groups of elements are all malleable, conduct electricity and are lustrous?

• Cl, He, Ne

• Cu, Na, Mg

• Mg, Ar, B

• Si, As, Se

Which group of elements is least reactive?

• Alkali metals

• Alkaline earth metals

• Halogens

• Noble gases

Which element only has two valence electrons?

• Potassium (K)

• Sulfur (S)

• Magnesium (Mg)

• Neon (Ne)

An atom has 25 protons, 30 neutrons, and 25 electrons. What is the charge of the atom's nucleus?

• +25
• +30
• -25
• -30

Tags

NGSS.MS-PS1-1

A model of a beryllium atom is shown below. What types of particles are found in the atom's nucleus?

• Positively charged particles and negatively charged particles

• Negatively charged particles only

• Neutral particles and positively charged particles

• Positively charged particles only

Tags

NGSS.HS-PS1-8