The identity of an element is determined by

A. the number of neutrons

B. the weight of the nucleus

OC. the number of electrons

D. the number of protons

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What are the basic needs of all living cells

Which of the notations below is another way to write the name of the following nuclide? A. iodine-53 B. iodide-53 C. iodide-127 D. iodine-127

The weight of an object is the product of its mass, m, and the acceleration of gravity, g (where g=9.8/s squared). If an object's mass is m=10. kg, what is the weight?

Which of the following is not an example of a chemical change? Digesting food Burning gas in an engine Cooking eggs Grinding pepper

In this redox reaction, identify the oxidizing agent.

Was the relationship among temperature, heat, and thermal energy?

What will most likely happen when a warmer air mass exists above a polar ice sheet? The temperature of the ice sheet will be lowered. Heat will be transferred from the air mass to the ice. The air mass will exert high pressure and rise upwards.

A 2.00 L sample of gas at 35 C is to be heated at constant pressure until it reaches a volume of 5.25 L. To what Kelvin temperature must this sample be heated?

Of the following reactions, which one produces oxygen gas? Fermentation Anaerobic respiration Aerobic respiration Photosynthesis

Describe the electrodes in this iron-copper galvanic cell.