Element X has a melting point of 1453°C, element Y has a melting point of 1083°C, and element Z has a melting point of 63.4°C. Which element is in group 1?
X
Y
Z
Which of these metals is the least hard?
Chromium
Nickel
Sodium
Which of these metals has the highest density?
Copper
Lithium
Which of these elements reacts vigorously with cold water?
Iron
Manganese
Which of these elements is a transition element?
Calcium
Chlorine
Which of these elements is a catalyst for the production of ammonia?
Iodine
Which property is typical of transition elements?
They form ions with different charges
They are not strong
They are in the gas state at room temperature
Which of these compounds is green?
Nickel(II) chloride
Calcium chloride
Rubidium chloride
Which of these compounds is pink?
Potassium chloride
Manganese(II) chloride
Lithium chloride
Which of these properties is typical of transition elements but not group 1 elements?
Conducts electricity
High melting point
Shiny when freshly cut