Which of these is the correct normal decimal notation for 5.23 × 10−4?

Fill in the blanks with the indicated demonstrative adjective or pronoun. Voy a comprar _________ pantalones verdes. (these)

Choose the correct direct object pronoun for each sentence. Voy a ver el partido de baloncesto.

The elements Li, Na, K, Rb, and Cs are the members of which group/family?

Metals tend to form ions with a positive charge. The most likely way to form a positively charged ion from an atom is by doing which of the following?

Which of these particles has a negative charge?

Fill in the blanks with the present tense of the indicated verbs. Yo ___ (poner)

Fill in the blank with the correct form of estar: Diana _______ enojada con su novio.

A football field is 100 yd long. What is its length in centimeters? (1 yd = 0.9144 m)

Choose the vocabulary word that best completes the sentence: Mañana voy al mercado al aire libre. Me gusta regatear con los _____________.