Which is an example of an element?

a. salt (nacl)

b. water (h20)

c. silver (ag)

d. electron (e-) hint?

Word elements can be used to show chemical reactions. When hydrogen burns in oxygen. Water is produced. The word equation is hydrogen + oxygen - water. Write the word equation for iron and sulphur combining to form iron sulphide.

an atom of element Y has an electronic structure of 2.8.5. Would the element Y be a metal or non-metal? Explain your answer

Which do all groups of plants have these are the choices A. chloroplasts B. roots C. spores D. tubes

Which nucleic acid is responsible for controlling the type of cell that is created? a. pla b. dna crna

What can happen to the flame if the gas flow is too great or too much air enters the air vent

What ionic bond occurs between what particles? A. Two Negative Ions B. A positive and negative ion C. Two positive ions D. Two neutral atoms

Which of the following are good traits of a hypothesis? it will be able to be tested it can predict an outcome it will explain the observations all of these

What is the mass of a box of nails

In a phase change of water between the liquid and the gas phases, 770.1 kJ of energy was released by the system. What was the product, and how much of it was formed in the phase change? (dа ta: H₂O (l) → H₂O (g) ΔH = 44.01 kJ/mol.) A.

Explain the problem surrounding the ammonia-making process in terms of chemical equilibrium. Chemical equation for producing ammonia: N2 + 3H2 ⇌ 2NH3 + energy